Creating a schema

Schema defines the structure against which your queries are executed.

See also

• Specification
• Schema

Schema creation includes following steps:

1. Create instance of SchemaBuilder
2. Create query root type
3. Build schema

    [Fact]
    public async Task Part1_CreateSchema()
    {
        // 1. Create builder
        var builder = new SchemaBuilder();

        // 2. Create Query type from SDL by defining a type with 
        // name Query. This is by convention.
        builder.Add(@"
                type Query {
                    name: String
                }
                ");

        // 3. Build schema
        var schema = await builder.Build(new SchemaBuildOptions());

        // Assert that created schema matches the inputs
        // note: By convention the name on the Query root type is Query
        Assert.Equal("Query", schema.Query.Name);

        // Schema has methods for querying the fields of the type.
        // In this case assertion is done to check that "name" field exists
        // for Query type. Fields are key value pairs where key is the name
        // of the field and value is the actual field.
        Assert.Single(
            schema.GetFields(schema.Query.Name),
            fieldDef => fieldDef.Key == "name");
    }