Cleanup and simplify query helpers
This commit is contained in:
Shadowghost
@@ -555,7 +555,7 @@ public sealed partial class BaseItemRepository
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if (filter.ArtistIds.Length > 0)
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{
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baseQuery = baseQuery.WhereReferencedItemMultipleTypes(context, [ItemValueType.Artist, ItemValueType.AlbumArtist], filter.ArtistIds);
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baseQuery = baseQuery.WhereReferencedItem(context, [ItemValueType.Artist, ItemValueType.AlbumArtist], filter.ArtistIds);
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}
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if (filter.AlbumArtistIds.Length > 0)
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@@ -586,12 +586,12 @@ public sealed partial class BaseItemRepository
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if (filter.ExcludeArtistIds.Length > 0)
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{
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baseQuery = baseQuery.WhereReferencedItemMultipleTypes(context, [ItemValueType.Artist, ItemValueType.AlbumArtist], filter.ExcludeArtistIds, true);
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baseQuery = baseQuery.WhereReferencedItem(context, [ItemValueType.Artist, ItemValueType.AlbumArtist], filter.ExcludeArtistIds, true);
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}
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if (filter.GenreIds.Count > 0)
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{
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baseQuery = baseQuery.WhereReferencedItem(context, ItemValueType.Genre, filter.GenreIds.ToArray());
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baseQuery = baseQuery.WhereReferencedItem(context, ItemValueType.Genre, filter.GenreIds);
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}
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if (filter.Genres.Count > 0)
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@@ -617,7 +617,7 @@ public sealed partial class BaseItemRepository
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if (filter.StudioIds.Length > 0)
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{
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baseQuery = baseQuery.WhereReferencedItem(context, ItemValueType.Studios, filter.StudioIds.ToArray());
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baseQuery = baseQuery.WhereReferencedItem(context, ItemValueType.Studios, filter.StudioIds);
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}
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if (filter.OfficialRatings.Length > 0)
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@@ -963,17 +963,6 @@ public sealed partial class BaseItemRepository
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baseQuery = baseQuery.WhereHasAnyProviderIds(filter.HasAnyProviderIds);
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}
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if (filter.HasAnyProviderIds is not null && filter.HasAnyProviderIds.Count > 0)
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{
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var includeAny = filter.HasAnyProviderIds
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.SelectMany(kvp => kvp.Value.Select(v => $"{kvp.Key}:{v}"))
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.ToArray();
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if (includeAny.Length > 0)
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{
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baseQuery = baseQuery.Where(e => e.Provider!.Select(f => f.ProviderId + ":" + f.ProviderValue)!.Any(f => includeAny.Contains(f)));
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}
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}
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if (filter.HasImdbId.HasValue)
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{
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baseQuery = filter.HasImdbId.Value
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+160
-143
@@ -14,6 +14,11 @@ namespace Jellyfin.Database.Implementations;
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/// <summary>
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/// Contains a number of query related extensions.
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/// </summary>
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/// <remarks>
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/// Every helper here binds its values through <see cref="EF.Parameter{T}(T)"/>. Values embedded as bare
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/// constants are inlined into the SQL as literals, which gives each distinct value its own entry in EF's
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/// compiled query cache and its own statement for the database to plan.
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/// </remarks>
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public static class JellyfinQueryHelperExtensions
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{
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private static readonly MethodInfo _containsMethodGenericCache = typeof(Enumerable).GetMethods(BindingFlags.Public | BindingFlags.Static).First(m => m.Name == nameof(Enumerable.Contains) && m.GetParameters().Length == 2);
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@@ -26,14 +31,63 @@ public static class JellyfinQueryHelperExtensions
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/// <typeparam name="TEntity">The entity.</typeparam>
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/// <typeparam name="TProperty">The property type to compare.</typeparam>
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/// <param name="query">The source query.</param>
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/// <param name="oneOf">The list of items to check.</param>
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/// <param name="oneOf">The list of items to check. An empty list matches nothing.</param>
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/// <param name="property">Property expression.</param>
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/// <returns>A Query.</returns>
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public static IQueryable<TEntity> WhereOneOrMany<TEntity, TProperty>(this IQueryable<TEntity> query, IList<TProperty> oneOf, Expression<Func<TEntity, TProperty>> property)
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public static IQueryable<TEntity> WhereOneOrMany<TEntity, TProperty>(this IQueryable<TEntity> query, IReadOnlyList<TProperty> oneOf, Expression<Func<TEntity, TProperty>> property)
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{
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return query.Where(OneOrManyExpressionBuilder(oneOf, property));
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}
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/// <summary>
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/// Builds an optimised query expression checking one property against a list of values while maintaining an optimal query.
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/// </summary>
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/// <typeparam name="TEntity">The entity.</typeparam>
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/// <typeparam name="TProperty">The property type to compare.</typeparam>
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/// <param name="oneOf">The list of items to check. An empty list matches nothing.</param>
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/// <param name="property">Property expression.</param>
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/// <returns>A Query.</returns>
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public static Expression<Func<TEntity, bool>> OneOrManyExpressionBuilder<TEntity, TProperty>(this IReadOnlyList<TProperty> oneOf, Expression<Func<TEntity, TProperty>> property)
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{
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ArgumentNullException.ThrowIfNull(oneOf);
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ArgumentNullException.ThrowIfNull(property);
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var parameter = Expression.Parameter(typeof(TEntity), "item");
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property = ParameterReplacer.Replace<Func<TEntity, TProperty>, Func<TEntity, TProperty>>(property, property.Parameters[0], parameter);
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if (oneOf.Count == 0)
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{
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// Fail closed, and without asking the database to unpack an empty collection to prove it.
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return Expression.Lambda<Func<TEntity, bool>>(Expression.Constant(false), parameter);
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}
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if (oneOf.Count == 1)
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{
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var value = Expression.Call(
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null,
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_efParameterInstruction.MakeGenericMethod(typeof(TProperty)),
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Expression.Constant(oneOf[0], typeof(TProperty)));
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return Expression.Lambda<Func<TEntity, bool>>(
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typeof(TProperty).IsValueType
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? Expression.Equal(property.Body, value)
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: Expression.ReferenceEqual(property.Body, value),
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parameter);
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}
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var containsMethodInfo = _containsQueryCache.GetOrAdd(typeof(TProperty), static (key) => _containsMethodGenericCache.MakeGenericMethod(key));
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// Binding the whole collection as one parameter keeps the statement identical for any element
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// count, instead of emitting one placeholder per element.
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return Expression.Lambda<Func<TEntity, bool>>(
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Expression.Call(
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null,
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containsMethodInfo,
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Expression.Call(null, _efParameterInstruction.MakeGenericMethod(oneOf.GetType()), Expression.Constant(oneOf)),
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property.Body),
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parameter);
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}
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/// <summary>
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/// Builds a query that checks referenced ItemValues for a cross BaseItem lookup.
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/// </summary>
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@@ -47,207 +101,170 @@ public static class JellyfinQueryHelperExtensions
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this IQueryable<BaseItemEntity> baseQuery,
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JellyfinDbContext context,
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ItemValueType itemValueType,
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IList<Guid> referenceIds,
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IReadOnlyList<Guid> referenceIds,
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bool invert = false)
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{
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return baseQuery.Where(ReferencedItemFilterExpressionBuilder(context, itemValueType, referenceIds, invert));
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return baseQuery.WhereReferencedItem(context, [itemValueType], referenceIds, invert);
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}
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/// <summary>
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/// Builds a query that checks referenced ItemValues for a cross BaseItem lookup.
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/// Builds a query that checks referenced ItemValues of any of the given types for a cross BaseItem lookup.
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/// </summary>
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/// <param name="baseQuery">The source query.</param>
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/// <param name="context">The database context.</param>
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/// <param name="itemValueTypes">The type of item value to reference.</param>
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/// <param name="itemValueTypes">The types of item value to reference.</param>
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/// <param name="referenceIds">The list of BaseItem ids to check matches.</param>
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/// <param name="invert">If set an exclusion check is performed instead.</param>
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/// <returns>A Query.</returns>
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public static IQueryable<BaseItemEntity> WhereReferencedItemMultipleTypes(
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/// <remarks>
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/// Matching is on CleanName alone. Genre/artist/album etc items do not set an ItemValue of their own
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/// type, so the referenced item's Type is never consulted and ids whose names clean to the same value
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/// are interchangeable across types.
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/// </remarks>
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public static IQueryable<BaseItemEntity> WhereReferencedItem(
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this IQueryable<BaseItemEntity> baseQuery,
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JellyfinDbContext context,
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IList<ItemValueType> itemValueTypes,
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IList<Guid> referenceIds,
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IReadOnlyList<ItemValueType> itemValueTypes,
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IReadOnlyList<Guid> referenceIds,
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bool invert = false)
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{
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var itemFilter = OneOrManyExpressionBuilder<BaseItemEntity, Guid>(referenceIds, f => f.Id);
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var typeFilter = OneOrManyExpressionBuilder<ItemValueMap, ItemValueType>(itemValueTypes, m => m.ItemValue.Type);
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ArgumentNullException.ThrowIfNull(context);
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// Flat sub-selects + Contains instead of a nested correlated .Any(...Any(...)).
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// Flat sub-selects rather than a correlated .Any(...Any(...)).
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var referencedCleanValues = context.BaseItems
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.Where(itemFilter)
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.Where(OneOrManyExpressionBuilder<BaseItemEntity, Guid>(referenceIds, e => e.Id))
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.Select(e => e.CleanName);
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var matchingItemIds = context.ItemValuesMap
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.Where(typeFilter)
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.Where(OneOrManyExpressionBuilder<ItemValueMap, ItemValueType>(itemValueTypes, m => m.ItemValue.Type))
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.Where(m => referencedCleanValues.Contains(m.ItemValue.CleanValue))
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.Select(m => m.ItemId);
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if (invert)
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{
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return baseQuery.Where(e => !matchingItemIds.Contains(e.Id));
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}
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return baseQuery.Where(e => matchingItemIds.Contains(e.Id));
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return invert
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? baseQuery.Where(e => !matchingItemIds.Contains(e.Id))
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: baseQuery.Where(e => matchingItemIds.Contains(e.Id));
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}
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/// <summary>
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/// Builds a query expression that checks referenced ItemValues for a cross BaseItem lookup.
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/// </summary>
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/// <param name="context">The database context.</param>
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/// <param name="itemValueType">The type of item value to reference.</param>
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/// <param name="referenceIds">The list of BaseItem ids to check matches.</param>
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/// <param name="invert">If set an exclusion check is performed instead.</param>
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/// <returns>A Query.</returns>
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public static Expression<Func<BaseItemEntity, bool>> ReferencedItemFilterExpressionBuilder(
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this JellyfinDbContext context,
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ItemValueType itemValueType,
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IList<Guid> referenceIds,
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bool invert = false)
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{
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// Well genre/artist/album etc items do not actually set the ItemValue of thier specitic types so we cannot match it that way.
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/*
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"(guid in (select itemid from ItemValues where CleanValue = (select CleanName from TypedBaseItems where guid=@GenreIds and Type=2)))"
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*/
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var itemFilter = OneOrManyExpressionBuilder<BaseItemEntity, Guid>(referenceIds, f => f.Id);
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// Flat sub-selects + Contains instead of a nested correlated .Any(...Any(...)).
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var referencedCleanValues = context.BaseItems
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.Where(itemFilter)
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.Select(e => e.CleanName);
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var matchingItemIds = context.ItemValuesMap
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.Where(m => m.ItemValue.Type == itemValueType && referencedCleanValues.Contains(m.ItemValue.CleanValue))
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.Select(m => m.ItemId);
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if (invert)
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{
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return item => !matchingItemIds.Contains(item.Id);
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}
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return item => matchingItemIds.Contains(item.Id);
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}
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/// <summary>
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/// Filters items that match any of the specified (provider name, value) pairs.
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/// Filters items that have any of the specified providers, optionally restricted to given values.
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/// </summary>
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/// <param name="baseQuery">The source query.</param>
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/// <param name="providerIds">Dictionary mapping provider names to arrays of values to match.</param>
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/// <param name="providerIds">Dictionary mapping provider names to values to match. An empty value array matches any value for that provider.</param>
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/// <returns>A filtered query.</returns>
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public static IQueryable<BaseItemEntity> WhereHasAnyProviderIds(
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this IQueryable<BaseItemEntity> baseQuery,
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IReadOnlyDictionary<string, string[]> providerIds)
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{
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var providerKeys = providerIds
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.SelectMany(kvp => kvp.Value.Select(v => $"{kvp.Key}:{v}"))
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.ToList();
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if (providerKeys.Count == 0)
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{
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return baseQuery;
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}
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return baseQuery.Where(e => e.Provider!.Any(p => providerKeys.Contains(p.ProviderId + ":" + p.ProviderValue)));
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return baseQuery.WhereProviderMatch(Flatten(providerIds), false);
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}
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/// <summary>
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/// Filters items that have any of the specified providers. Empty/null values match any value for that provider.
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/// Filters items that have any of the specified providers, optionally restricted to a given value.
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/// </summary>
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/// <param name="baseQuery">The source query.</param>
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/// <param name="providerIds">Dictionary mapping provider names to optional values.</param>
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/// <param name="providerIds">Dictionary mapping provider names to optional values. An empty value matches any value for that provider.</param>
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/// <returns>A filtered query.</returns>
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public static IQueryable<BaseItemEntity> WhereHasAnyProviderId(
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this IQueryable<BaseItemEntity> baseQuery,
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IReadOnlyDictionary<string, string> providerIds)
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{
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var existenceOnly = providerIds
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.Where(e => string.IsNullOrEmpty(e.Value))
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.Select(e => e.Key)
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.ToList();
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return baseQuery.WhereProviderMatch(providerIds, false);
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}
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var specificValues = providerIds
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.Where(e => !string.IsNullOrEmpty(e.Value))
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.Select(e => $"{e.Key}:{e.Value}")
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.ToList();
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/// <summary>
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/// Excludes items that have any of the specified providers, optionally restricted to a given value.
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/// </summary>
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/// <param name="baseQuery">The source query.</param>
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/// <param name="providerIds">Dictionary mapping provider names to optional values. An empty value excludes any value for that provider.</param>
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/// <returns>A filtered query.</returns>
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public static IQueryable<BaseItemEntity> WhereExcludeProviderIds(
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this IQueryable<BaseItemEntity> baseQuery,
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IReadOnlyDictionary<string, string> providerIds)
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{
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return baseQuery.WhereProviderMatch(providerIds, true);
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}
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private static IEnumerable<KeyValuePair<string, string>> Flatten(IReadOnlyDictionary<string, string[]> providerIds)
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{
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ArgumentNullException.ThrowIfNull(providerIds);
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foreach (var (provider, values) in providerIds)
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{
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if (values is null || values.Length == 0)
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{
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yield return new KeyValuePair<string, string>(provider, string.Empty);
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continue;
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}
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foreach (var value in values)
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{
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yield return new KeyValuePair<string, string>(provider, value);
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}
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}
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}
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/// <summary>
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/// Matches items against a set of (provider, value) pairs, where an empty value means any value for
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/// that provider. Emits a single EXISTS over the provider collection with the predicates OR'd, rather
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/// than one subquery per predicate group.
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/// </summary>
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private static IQueryable<BaseItemEntity> WhereProviderMatch(
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this IQueryable<BaseItemEntity> baseQuery,
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IEnumerable<KeyValuePair<string, string>> providerIds,
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bool invert)
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{
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ArgumentNullException.ThrowIfNull(providerIds);
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var existenceOnly = new List<string>();
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var specificValues = new List<string>();
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foreach (var (provider, value) in providerIds)
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{
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if (string.IsNullOrEmpty(value))
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{
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existenceOnly.Add(provider);
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}
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else
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{
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specificValues.Add(provider + ":" + value);
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}
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}
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if (existenceOnly.Count == 0 && specificValues.Count == 0)
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{
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return baseQuery;
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}
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if (existenceOnly.Count == 0)
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{
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return baseQuery.Where(e => e.Provider!.Any(p =>
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specificValues.Contains(p.ProviderId + ":" + p.ProviderValue)));
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}
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var predicate = ProviderPredicate(existenceOnly, specificValues);
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// NOT EXISTS rather than NOT IN: the latter yields no rows at all if the subquery can produce NULL.
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return invert
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? baseQuery.Where(e => !e.Provider!.AsQueryable().Any(predicate))
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: baseQuery.Where(e => e.Provider!.AsQueryable().Any(predicate));
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}
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private static Expression<Func<BaseItemProvider, bool>> ProviderPredicate(
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IReadOnlyList<string> existenceOnly,
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IReadOnlyList<string> specificValues)
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{
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if (specificValues.Count == 0)
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{
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return baseQuery.Where(e => e.Provider!.Any(p => existenceOnly.Contains(p.ProviderId)));
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return existenceOnly.OneOrManyExpressionBuilder<BaseItemProvider, string>(p => p.ProviderId);
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}
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// Single EXISTS over Provider with both predicates OR'd, instead of two separate subqueries.
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return baseQuery.Where(e => e.Provider!.Any(p =>
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existenceOnly.Contains(p.ProviderId) ||
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specificValues.Contains(p.ProviderId + ":" + p.ProviderValue)));
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}
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/// <summary>
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/// Excludes items that match any of the specified (provider name, value) pairs.
|
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/// </summary>
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/// <param name="baseQuery">The source query.</param>
|
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/// <param name="providerIds">Dictionary mapping provider names to values to exclude.</param>
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/// <returns>A filtered query.</returns>
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public static IQueryable<BaseItemEntity> WhereExcludeProviderIds(
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this IQueryable<BaseItemEntity> baseQuery,
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IReadOnlyDictionary<string, string> providerIds)
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{
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var excludeKeys = providerIds
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.Select(e => $"{e.Key}:{e.Value}")
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.ToList();
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if (excludeKeys.Count == 0)
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if (existenceOnly.Count == 0)
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{
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return baseQuery;
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return specificValues.OneOrManyExpressionBuilder<BaseItemProvider, string>(p => p.ProviderId + ":" + p.ProviderValue);
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}
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return baseQuery.Where(e => e.Provider!.All(p => !excludeKeys.Contains(p.ProviderId + ":" + p.ProviderValue)));
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}
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var byProvider = existenceOnly.OneOrManyExpressionBuilder<BaseItemProvider, string>(p => p.ProviderId);
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var byPair = specificValues.OneOrManyExpressionBuilder<BaseItemProvider, string>(p => p.ProviderId + ":" + p.ProviderValue);
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|
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/// <summary>
|
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/// Builds an optimised query expression checking one property against a list of values while maintaining an optimal query.
|
||||
/// </summary>
|
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/// <typeparam name="TEntity">The entity.</typeparam>
|
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/// <typeparam name="TProperty">The property type to compare.</typeparam>
|
||||
/// <param name="oneOf">The list of items to check.</param>
|
||||
/// <param name="property">Property expression.</param>
|
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/// <returns>A Query.</returns>
|
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public static Expression<Func<TEntity, bool>> OneOrManyExpressionBuilder<TEntity, TProperty>(this IList<TProperty> oneOf, Expression<Func<TEntity, TProperty>> property)
|
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{
|
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var parameter = Expression.Parameter(typeof(TEntity), "item");
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||||
property = ParameterReplacer.Replace<Func<TEntity, TProperty>, Func<TEntity, TProperty>>(property, property.Parameters[0], parameter);
|
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if (oneOf.Count == 1)
|
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{
|
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var value = oneOf[0];
|
||||
if (typeof(TProperty).IsValueType)
|
||||
{
|
||||
return Expression.Lambda<Func<TEntity, bool>>(Expression.Equal(property.Body, Expression.Constant(value)), parameter);
|
||||
}
|
||||
else
|
||||
{
|
||||
return Expression.Lambda<Func<TEntity, bool>>(Expression.ReferenceEqual(property.Body, Expression.Constant(value)), parameter);
|
||||
}
|
||||
}
|
||||
// Both builders mint their own parameter; rebind so the two bodies can share one lambda.
|
||||
var parameter = byProvider.Parameters[0];
|
||||
var reboundPair = ParameterReplacer.Replace<Func<BaseItemProvider, bool>, Func<BaseItemProvider, bool>>(byPair, byPair.Parameters[0], parameter);
|
||||
|
||||
var containsMethodInfo = _containsQueryCache.GetOrAdd(typeof(TProperty), static (key) => _containsMethodGenericCache.MakeGenericMethod(key));
|
||||
|
||||
// Always wrap the collection in EF.Parameter so EF Core caches a single compiled plan and reuses it across calls.
|
||||
return Expression.Lambda<Func<TEntity, bool>>(
|
||||
Expression.Call(
|
||||
null,
|
||||
containsMethodInfo,
|
||||
Expression.Call(null, _efParameterInstruction.MakeGenericMethod(oneOf.GetType()), Expression.Constant(oneOf)),
|
||||
property.Body),
|
||||
return Expression.Lambda<Func<BaseItemProvider, bool>>(
|
||||
Expression.OrElse(byProvider.Body, reboundPair.Body),
|
||||
parameter);
|
||||
}
|
||||
|
||||
|
||||
Reference in New Issue
Block a user