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Merged
dibble-james merged 1 commit into from
Jul 23, 2025
Merged

Project from an operation result #27

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20 changes: 20 additions & 0 deletions LinQL.GraphQL.Client.Tests/QueryTests.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -42,6 +42,16 @@ public async Task TestSendQuery()
result.Data.Should().Be(12345);
}

[Fact]
public async Task TestSendProjectionQuery()
{
var result = await this.client.SendAsync((TestQuery q) => q.ExecuteEchoOperation("echo").Project(e => new { e.Echo, e.Number }));

result.Errors.Should().BeNull();
result.Data.Number.Should().Be(42);
result.Data.Echo.Should().Be("echo");
}

[Fact]
public async Task TestSendMutation()
{
Expand All @@ -60,8 +70,12 @@ public void Dispose()
public class TestQueryType
{
public int GetNumber() => 12345;

public TestObjectType EchoOperation(string toEcho) => new(toEcho, 42);
}

public record TestObjectType(string Echo, int Number);

public class TestMutationType
{
public NumberResult SetNumber([GraphQLArgument(GQLType = "Int")] int input) => new() { Number = input };
Expand All @@ -79,6 +93,12 @@ public class TestQuery : RootType<TestQuery>

[GraphQLOperation, GraphQLField(Name = "number")]
public int GetNumber() => this.Number;

[GraphQLOperation, GraphQLField(Name = "echoOperation")]
public TestObjectType ExecuteEchoOperation([GraphQLArgument(GQLType = "String!")] string toEcho)
=> this.EchoOperation;

public TestObjectType EchoOperation { get; set; }
}

[OperationType(RootOperationType.Mutation)]
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14 changes: 14 additions & 0 deletions LinQL.Tests/Translation/TranslationProviderTests.cs
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Expand Up @@ -181,6 +181,8 @@ public void SelectInterfaceArrayMultipleTypesSelectAll()

private record Projection(int Number, string? Text);

private record NestedProjection(float Float, Projection Projection);

[Fact]
public void ProjectArrayOfInterface()
=> this.Test<InterfaceRootType, object>(x => x.ArrayOfInterfaces.Select(a => new Projection(a.Number, a.Text)));
Expand All @@ -205,6 +207,18 @@ private void TestInclude<TRoot, TData>(Expression<Func<TRoot, TData>> expression
Snapshot.Match(request.Query);
}

[Fact]
public void Project()
=> this.Test<NestedOperationType, Projection>(x => x.Operation.GetNumber("project me").Project(y => new Projection(y.Number, y.Text)));

[Fact]
public void ProjectAcrossMultipleLevels()
=> this.Test<NestedOperationType, Projection>(x => new Projection(x.Number, x.Operation.GetNumber("project me").Project(y => y.Text)));

[Fact]
public void ProjectSameOperationMultipleTimes()
=> this.Test<NestedOperationType, NestedProjection>(x => new NestedProjection(x.Operation.Float, x.Operation.GetNumber("project me").Project(y => new Projection(y.Number, y.Text))));

private void Test<TRoot, TData>(Expression<Func<TRoot, TData>> expression)
where TRoot : RootType<TRoot>
=> this.TestInclude(expression, _ => { });
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13 changes: 13 additions & 0 deletions LinQL.Tests/Translation/__snapshots__/TranslationProviderTests.Project.snap
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@@ -0,0 +1,13 @@
query linql(
$var1: String!
)
{
operation {
getNumber(
value: $var1
) {
number
text
}
}
}
13 changes: 13 additions & 0 deletions ...Tests/Translation/__snapshots__/TranslationProviderTests.ProjectAcrossMultipleLevels.snap
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Original file line number Diff line number Diff line change
@@ -0,0 +1,13 @@
query linql(
$var1: String!
)
{
number
operation {
getNumber(
value: $var1
) {
text
}
}
}
14 changes: 14 additions & 0 deletions ...Translation/__snapshots__/TranslationProviderTests.ProjectSameOperationMultipleTimes.snap
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@@ -0,0 +1,14 @@
query linql(
$var1: String!
)
{
operation {
float
getNumber(
value: $var1
) {
number
text
}
}
}
10 changes: 10 additions & 0 deletions LinQL/SelectExtentions.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -60,4 +60,14 @@ public static OneOf<T, TResult> On<T, TMaybe, TResult>(this OneOf<T, TResult> th
/// <param name="that">The type.</param>
/// <returns>The type.</returns>
public static T SelectAll<T>(this T that) => that;

/// <summary>
/// Instruct the query to get all scalar fields on this type.
/// </summary>
/// <typeparam name="T">The type to select from.</typeparam>
/// <typeparam name="TResult">The type to project to.</typeparam>
/// <param name="that">The type.</param>
/// <param name="projection">The expression required to create <typeparamref name="TResult"/> from <typeparamref name="T"/>.</param>
/// <returns>The projection.</returns>
public static TResult Project<T, TResult>(this T that, Expression<Func<T, TResult>> projection) => projection.CompileFast()(that);
}
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