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CSHARP-4880: Support SequenceEqual in aggregation expressions.
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63 changes: 63 additions & 0 deletions
63
...sionTranslators/MethodTranslators/SequenceEqualMethodToAggregationExpressionTranslator.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,63 @@ | ||
| /* Copyright 2010-present MongoDB Inc. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| using System.Linq.Expressions; | ||
| using MongoDB.Bson.Serialization.Serializers; | ||
| using MongoDB.Driver.Linq.Linq3Implementation.Ast.Expressions; | ||
| using MongoDB.Driver.Linq.Linq3Implementation.Misc; | ||
| using MongoDB.Driver.Linq.Linq3Implementation.Reflection; | ||
|
|
||
| namespace MongoDB.Driver.Linq.Linq3Implementation.Translators.ExpressionToAggregationExpressionTranslators.MethodTranslators | ||
| { | ||
| internal static class SequenceEqualMethodToAggregationExpressionTranslator | ||
| { | ||
| public static AggregationExpression Translate(TranslationContext context, MethodCallExpression expression) | ||
| { | ||
| var method = expression.Method; | ||
| var arguments = expression.Arguments; | ||
|
|
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| if (method.IsOneOf(EnumerableMethod.SequenceEqual, QueryableMethod.SequenceEqual)) | ||
| { | ||
| var firstExpression = arguments[0]; | ||
| var secondExpression = arguments[1]; | ||
|
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| var firstTranslation = ExpressionToAggregationExpressionTranslator.Translate(context, firstExpression); | ||
| var secondTranslation = ExpressionToAggregationExpressionTranslator.Translate(context, secondExpression); | ||
|
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| var (firstVarBinding, firstAst) = AstExpression.UseVarIfNotSimple("first", firstTranslation.Ast); | ||
| var (secondVarBinding, secondAst) = AstExpression.UseVarIfNotSimple("second", secondTranslation.Ast); | ||
| var pairVar = AstExpression.Var("pair"); | ||
|
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| var ast = AstExpression.Let( | ||
| firstVarBinding, | ||
| secondVarBinding, | ||
| @in : AstExpression.And( | ||
| AstExpression.Eq(AstExpression.Type(firstAst), "array"), | ||
| AstExpression.Eq(AstExpression.Type(secondAst), "array"), | ||
| AstExpression.Eq(AstExpression.Size(firstAst), AstExpression.Size(secondAst)), | ||
| AstExpression.AllElementsTrue( | ||
| AstExpression.Map( | ||
| input: AstExpression.Zip([firstAst, secondAst]), | ||
| @as: pairVar, | ||
| @in : AstExpression.Eq(AstExpression.ArrayElemAt(pairVar, 0), AstExpression.ArrayElemAt(pairVar, 1))))) | ||
| ); | ||
|
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| return new AggregationExpression(expression, ast, new BooleanSerializer()); | ||
| } | ||
|
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| throw new ExpressionNotSupportedException(expression); | ||
| } | ||
| } | ||
| } |
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tests/MongoDB.Driver.Tests/Linq/Linq3Implementation/Jira/CSharp4880Tests.cs
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,66 @@ | ||
| /* Copyright 2010-present MongoDB Inc. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| using System.Linq; | ||
| using FluentAssertions; | ||
| using MongoDB.Bson; | ||
| using MongoDB.TestHelpers.XunitExtensions; | ||
| using Xunit; | ||
|
|
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| namespace MongoDB.Driver.Tests.Linq.Linq3Implementation.Jira | ||
| { | ||
| public class CSharp4880Tests : Linq3IntegrationTest | ||
| { | ||
| [Theory] | ||
| [ParameterAttributeData] | ||
| public void Select_SequenceEqual_should_work( | ||
| [Values(false, true)] bool withNestedAsQueryable) | ||
| { | ||
| var collection = GetCollection(); | ||
|
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| var queryable = withNestedAsQueryable ? | ||
| collection.AsQueryable().Select(x => x.A.AsQueryable().SequenceEqual(x.B)) : | ||
| collection.AsQueryable().Select(x => x.A.SequenceEqual(x.B)); | ||
|
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| var stages = Translate(collection, queryable); | ||
| AssertStages(stages, "{ $project : { _v : { $and : [{ $eq : [{ $type : '$A' }, 'array'] }, { $eq : [{ $type : '$B' }, 'array'] }, { $eq : [{ $size : '$A' }, { $size : '$B' }] }, { $allElementsTrue : { $map : { input : { $zip : { inputs : ['$A', '$B'] } }, as : 'pair', in: { $eq : [{ $arrayElemAt : ['$$pair', 0] }, { $arrayElemAt : ['$$pair', 1] }] } } } }] }, _id : 0 } }"); | ||
|
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| var results = queryable.ToList(); | ||
| results.Should().Equal(false, false, false, false, true, false, false); | ||
| } | ||
|
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| private IMongoCollection<C> GetCollection() | ||
| { | ||
| var collection = GetCollection<C>("test"); | ||
| CreateCollection( | ||
| collection.Database.GetCollection<BsonDocument>(collection.CollectionNamespace.CollectionName), | ||
| BsonDocument.Parse("{ _id : 1, A : null, B : null }"), | ||
| BsonDocument.Parse("{ _id : 2, A : null, B : [1, 2, 3] }"), | ||
| BsonDocument.Parse("{ _id : 3, A : [1, 2, 3], B : null }"), | ||
| BsonDocument.Parse("{ _id : 4, A : [1, 2, 3], B : [1, 2] }"), | ||
| BsonDocument.Parse("{ _id : 5, A : [1, 2, 3], B : [1, 2, 3] }"), | ||
| BsonDocument.Parse("{ _id : 6, A : [1, 2, 3], B : [4, 5, 6] }"), | ||
| BsonDocument.Parse("{ _id : 7, A : [1, 2, 3], B : [1, 2, 3, 4] }")); | ||
| return collection; | ||
| } | ||
|
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| private class C | ||
| { | ||
| public int Id { get; set; } | ||
| public int[] A { get; set; } | ||
| public int[] B { get; set; } | ||
| } | ||
| } | ||
| } |