|
1 |
| -using Microsoft.EntityFrameworkCore; |
2 |
| -using System; |
3 |
| -using System.Collections.Generic; |
4 |
| -using System.Diagnostics; |
5 |
| -using System.Linq; |
6 |
| -using System.Linq.Dynamic.Core; |
7 |
| - |
8 |
| -namespace DynamicLinqWithEfCoreTest |
9 |
| -{ |
10 |
| - class Program |
11 |
| - { |
12 |
| - static void Main(string[] args) |
13 |
| - { |
14 |
| - var list = new List<Person> |
15 |
| - { |
16 |
| - new Person |
17 |
| - { |
18 |
| - Age = 1, |
19 |
| - EnglishName = "sadfasdf", |
20 |
| - Id = Guid.NewGuid(), |
21 |
| - Name = "tom" |
22 |
| - }, |
23 |
| - new Person |
24 |
| - { |
25 |
| - Age = 2, |
26 |
| - EnglishName = "ddddd", |
27 |
| - Id = Guid.NewGuid(), |
28 |
| - Name = "jerry" |
29 |
| - } |
30 |
| - }; |
31 |
| - |
32 |
| - using (var context = new TestContext()) |
33 |
| - { |
34 |
| - context.Set<Person>().AddRange(list); |
35 |
| - context.SaveChanges(); |
36 |
| - } |
37 |
| - |
38 |
| - const int num = 100_000; |
39 |
| - |
40 |
| - var sw = Stopwatch.StartNew(); |
41 |
| - |
42 |
| - for (var i = 0; i < num; i++) |
43 |
| - { |
44 |
| - using (var context = new TestContext()) |
45 |
| - { |
46 |
| - var set = context.Set<Person>().Where(m => m.Age == 1 && m.Name == "tom").ToList(); |
47 |
| - } |
48 |
| - } |
49 |
| - |
50 |
| - Console.WriteLine(sw.Elapsed); |
51 |
| - |
52 |
| - sw.Restart(); |
53 |
| - |
54 |
| - for (var i = 0; i < num; i++) |
55 |
| - { |
56 |
| - using (var context = new TestContext()) |
57 |
| - { |
58 |
| - var set = context.Set<Person>().Where("$.Age==@0 and $.Name==@1", 1, "tom").ToList(); |
59 |
| - } |
60 |
| - } |
61 |
| - |
62 |
| - Console.WriteLine(sw.Elapsed); |
63 |
| - |
64 |
| - //Console.WriteLine("Press any key to quit"); |
65 |
| - //Console.ReadKey(); |
66 |
| - } |
67 |
| - } |
68 |
| - |
69 |
| - public class Person |
70 |
| - { |
71 |
| - public Guid Id { get; set; } |
72 |
| - public int Age { get; set; } |
73 |
| - public string Name { get; set; } |
74 |
| - public string EnglishName { get; set; } |
75 |
| - } |
76 |
| - |
77 |
| - public class TestContext : DbContext |
78 |
| - { |
79 |
| - public TestContext() |
80 |
| - { |
81 |
| - |
82 |
| - } |
83 |
| - |
84 |
| - public TestContext(DbContextOptions<TestContext> options) : base(options) |
85 |
| - { |
86 |
| - |
87 |
| - } |
88 |
| - |
89 |
| - protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) |
90 |
| - { |
91 |
| - optionsBuilder.UseInMemoryDatabase("test"); |
92 |
| - } |
93 |
| - |
94 |
| - protected override void OnModelCreating(ModelBuilder modelBuilder) |
95 |
| - { |
96 |
| - modelBuilder.Entity<Person>().HasKey(m => m.Id); |
97 |
| - } |
98 |
| - } |
99 |
| -} |
| 1 | +using Microsoft.EntityFrameworkCore; |
| 2 | +using Microsoft.EntityFrameworkCore.Diagnostics; |
| 3 | +using Microsoft.Extensions.Logging; |
| 4 | +using System; |
| 5 | +using System.Collections.Generic; |
| 6 | +using System.Diagnostics; |
| 7 | +using System.Linq; |
| 8 | +using System.Linq.Dynamic.Core; |
| 9 | +using System.Linq.Expressions; |
| 10 | + |
| 11 | +namespace DynamicLinqWithEfCoreTest |
| 12 | +{ |
| 13 | + class Program |
| 14 | + { |
| 15 | + static void Main(string[] args) |
| 16 | + { |
| 17 | + var list = new List<Person> |
| 18 | + { |
| 19 | + new Person |
| 20 | + { |
| 21 | + Age = 1, |
| 22 | + EnglishName = "sadfasdf", |
| 23 | + Id = Guid.NewGuid(), |
| 24 | + Name = "tom" |
| 25 | + }, |
| 26 | + new Person |
| 27 | + { |
| 28 | + Age = 2, |
| 29 | + EnglishName = "ddddd", |
| 30 | + Id = Guid.NewGuid(), |
| 31 | + Name = "jerry" |
| 32 | + } |
| 33 | + }; |
| 34 | + |
| 35 | + using (var context = new TestContext()) |
| 36 | + { |
| 37 | + try |
| 38 | + { |
| 39 | + //DynamicExpressionParser.ParseLambda(new ParsingConfig { UseDynamicObjectClassForAnonymousTypes = true }, null, "new {1 AS Id}"); |
| 40 | + |
| 41 | + context.Database.EnsureCreated(); |
| 42 | + |
| 43 | + context.Set<Person>().AddRange(list); |
| 44 | + context.SaveChanges(); |
| 45 | + |
| 46 | + context.Set<Person>().Select(d => new Tuple<int>(d.Age)).GroupBy(d => new Tuple<int>(d.Item1)).Select("new {Key.Item1, Sum(Item1) As Value}").TryLogToList("exp: Tuple,Tuple"); |
| 47 | + context.Set<Person>().Select(d => new { Id = d.Age }).GroupBy(d => new { Id = d.Id }).Select("new {Key.Id, Sum(Id) As Value}").TryLogToList("exp: Anonymous,Anonymous"); |
| 48 | + context.Set<Person>().Select(d => new { Id = d.Age }).GroupBy(d => new Tmp1 { Id = d.Id }).Select("new {Key.Id, Sum(Id) As Value}").TryLogToList("exp: Anonymous,Tmp1; should failed"); |
| 49 | + context.Set<Person>().Select(d => new { Id = d.Age }).GroupBy(d => new Tmp2 { Id = d.Id }).Select("new {Key.Id, Sum(Id) As Value}").TryLogToList("exp: Anonymous,Tmp2; should failed"); |
| 50 | + context.Set<Person>().Select(d => new Tmp1 { Id = d.Age }).GroupBy(d => new { Id = d.Id }).Select("new {Key.Id, Sum(Id) As Value}").TryLogToList("exp: Tmp1,Anonymous; should failed"); |
| 51 | + context.Set<Person>().Select(d => new Tmp2 { Id = d.Age }).GroupBy(d => new { Id = d.Id }).Select("new {Key.Id, Sum(Id) As Value}").TryLogToList("exp: Tmp2,Anonymous; should failed"); |
| 52 | + |
| 53 | + context.Set<Person>().Select("new { Age AS Id }").GroupBy("new { Id }").Select("new {Key.Id, Sum(Id) As Value}").TryLogToList("dyn: Anonymous,Anonymous"); |
| 54 | + //Note the changed in #117 for Anonymous Type is also needed |
| 55 | + context.Set<Person>().Select4Test("new { Age AS Id }", true).GroupBy4Test("new { Id }", true).Select("new {Key.Id, Sum(Id) As Value}").TryLogToList("dyn: Anonymous,Anonymous; with createParameterCtor=true"); |
| 56 | + context.Set<Person>().Select4Test("new { Age AS Id }", false).GroupBy4Test("new { Id }", false).Select("new {Key.Id, Sum(Id) As Value}").TryLogToList("dyn: Anonymous,Anonymous; with createParameterCtor=false"); |
| 57 | + |
| 58 | + context.Set<Person>().Select<Tmp1>("new { Age AS Id }").GroupBy(DynamicExpressionParser.ParseLambda<Tmp1, Tmp1>(null, false, "new { Id }")).Select("new {Key.Id, Sum(Id) As Value}").TryLogToList("dyn: Tmp1,Tmp1(without ParameterCtor)"); |
| 59 | + context.Set<Person>().Select<Tmp2>("new { Age AS Id }").GroupBy(DynamicExpressionParser.ParseLambda<Tmp2, Tmp2>(null, false, "new { Id }")).Select("new {Key.Id, Sum(Id) As Value}").TryLogToList("dyn: Tmp2,Tmp2(with ParameterCtor)"); |
| 60 | + } |
| 61 | + finally |
| 62 | + { |
| 63 | + context.Database.EnsureDeleted(); |
| 64 | + } |
| 65 | + } |
| 66 | + |
| 67 | + Console.WriteLine("Press any key to quit"); |
| 68 | + Console.ReadKey(); |
| 69 | + } |
| 70 | + //one class without createParameterCtor |
| 71 | + public class Tmp1 |
| 72 | + { |
| 73 | + public Tmp1() |
| 74 | + { |
| 75 | + } |
| 76 | + public int Id { get; set; } |
| 77 | + } |
| 78 | + //one class with createParameterCtor |
| 79 | + public class Tmp2 |
| 80 | + { |
| 81 | + public Tmp2() |
| 82 | + { |
| 83 | + } |
| 84 | + public Tmp2(int id) |
| 85 | + { |
| 86 | + } |
| 87 | + public int Id { get; set; } |
| 88 | + } |
| 89 | + } |
| 90 | + |
| 91 | + internal static class TestUtils |
| 92 | + { |
| 93 | + public static IQueryable Select4Test(this IQueryable source, string selector, bool createParameterCtor) |
| 94 | + { |
| 95 | + LambdaExpression lambda = DynamicExpressionParser.ParseLambda(null, createParameterCtor, source.ElementType, null, selector); |
| 96 | + |
| 97 | + var optimized = Expression.Call( |
| 98 | + typeof(Queryable), nameof(Queryable.Select), |
| 99 | + new[] { source.ElementType, lambda.Body.Type }, |
| 100 | + source.Expression, Expression.Quote(lambda)); |
| 101 | + |
| 102 | + return source.Provider.CreateQuery(optimized); |
| 103 | + } |
| 104 | + |
| 105 | + public static IQueryable GroupBy4Test(this IQueryable source, string keySelector, bool createParameterCtor) |
| 106 | + { |
| 107 | + var keyLambda = DynamicExpressionParser.ParseLambda(null, createParameterCtor, source.ElementType, null, keySelector); |
| 108 | + |
| 109 | + var optimized = Expression.Call( |
| 110 | + typeof(Queryable), nameof(Queryable.GroupBy), |
| 111 | + new[] { source.ElementType, keyLambda.Body.Type }, source.Expression, Expression.Quote(keyLambda)); |
| 112 | + |
| 113 | + return source.Provider.CreateQuery(optimized); |
| 114 | + } |
| 115 | + |
| 116 | + public static List<dynamic> TryLogToList(this IQueryable queryable, string tag) |
| 117 | + { |
| 118 | + try |
| 119 | + { |
| 120 | + var res = queryable.ToDynamicList(); |
| 121 | + Console.Error.WriteLine($"Success query with {tag}." + Environment.NewLine); |
| 122 | + return res; |
| 123 | + } |
| 124 | + catch (Exception e) |
| 125 | + { |
| 126 | + Console.Error.WriteLine($"Failed query with {tag}:" + Environment.NewLine + e.Message + Environment.NewLine); |
| 127 | + return null; |
| 128 | + } |
| 129 | + } |
| 130 | + } |
| 131 | + |
| 132 | + public class Person |
| 133 | + { |
| 134 | + public Guid Id { get; set; } |
| 135 | + public int Age { get; set; } |
| 136 | + public string Name { get; set; } |
| 137 | + public string EnglishName { get; set; } |
| 138 | + } |
| 139 | + |
| 140 | + public class TestContext : DbContext |
| 141 | + { |
| 142 | + public TestContext() |
| 143 | + { |
| 144 | + |
| 145 | + } |
| 146 | + |
| 147 | + public TestContext(DbContextOptions<TestContext> options) : base(options) |
| 148 | + { |
| 149 | + |
| 150 | + } |
| 151 | + |
| 152 | + protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) |
| 153 | + { |
| 154 | + optionsBuilder.UseSqlServer(@"Server=(localdb)\mssqllocaldb;Database=Test165;Trusted_Connection=True;") |
| 155 | + .ConfigureWarnings(warns=>warns.Throw(RelationalEventId.QueryClientEvaluationWarning)); |
| 156 | + } |
| 157 | + |
| 158 | + protected override void OnModelCreating(ModelBuilder modelBuilder) |
| 159 | + { |
| 160 | + modelBuilder.Entity<Person>().HasKey(m => m.Id); |
| 161 | + } |
| 162 | + } |
| 163 | +} |
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