public void SimpleParametrizedQueryTest()
{
var queryBuilder = GetQueryBuilder(@"
type DrawSchema {
id: ID
name: String!
}
type Query {
schemas(productId: Int!): [DrawSchema]
}");
var query = new DrawSchema[0]
.AsQueryable()
.Where(new { productId = 111 });
var variablesResolver = new VariablesResolver();
var queryText = queryBuilder.BuildQuery(query.Expression, variablesResolver, out var entryPoint);
queryText = PostProcessQuery(queryText);
Assert.Equal("schemas", entryPoint);
Assert.Equal("query($linq_param_0: Int!) { schemas(productId: $linq_param_0) { id name } }", queryText);
var variable = Assert.Single(variablesResolver.GetAllVariables());
Assert.Equal("linq_param_0", variable.name);
Assert.Equal(111, variable.value);
}
public void ParametrizedSelectQueryTest()
{
var queryBuilder = GetQueryBuilder(@"
type ProductInfo {
title: String!
version: String!
}
type Product {
id: ID
productInfo: ProductInfo!
}
type Query {
products: [Product]
product(productId: Int!): Product
}");
var query = new Product[0]
.AsQueryable()
.Where(new { productId = 111 })
.Select(_ => _.ProductInfo);
var variablesResolver = new VariablesResolver();
var queryText = queryBuilder.BuildQuery(query.Expression, variablesResolver, out var entryPoint);
queryText = PostProcessQuery(queryText);
Assert.Equal("product", entryPoint);
Assert.Equal("query($linq_param_0: Int!) { product(productId: $linq_param_0) { productInfo { title version } } }", queryText);
var variable = Assert.Single(variablesResolver.GetAllVariables());
Assert.Equal("linq_param_0", variable.name);
Assert.Equal(111, variable.value);
}
public object Execute(Expression expression)
{
var variablesResolver = new VariablesResolver();
var query = queryBuilder.BuildQuery(expression, variablesResolver, out var entryPoint);
var request = new GraphQLRequest
{
Query = query,
Variables = variablesResolver.GetAllVariables().ToDictionary(_ => _.name, _ => _.value)
};
var result = Task.Run(() => client.SendQueryAsync <JToken>(request, CancellationToken.None))
.GetAwaiter()
.GetResult();
expression = RewriteExpression(expression, result.Data[entryPoint]);
return(expression switch
{
MethodCallExpression method => Expression.Lambda <Func <object> >(method).Compile()(),
ConstantExpression constant => constant.Value,
_ => throw new NotImplementedException()
});
