first issue

mutations/mutations.go

@@ -0,0 +1,12 @@
+package mutations
+
+import (
+	"github.com/graphql-go/graphql"
+)
+
+// GetRootFields returns all the available mutations.
+func GetRootFields() graphql.Fields {
+	return graphql.Fields{
+		"createUser": GetCreateUserMutation(),
+	}
+}

mutations/requests.go

@@ -0,0 +1,5 @@
+package mutations
+
+const (
+	ADD_USER = `INSERT INTO users (firstname, lastname) VALUES ($1, $2)`
+)

mutations/user.go

@@ -0,0 +1,35 @@
+package mutations
+
+import (
+	"cadoles/graphql/postgres"
+	"cadoles/graphql/types"
+
+	"github.com/graphql-go/graphql"
+)
+
+// GetCreateUserMutation creates a new user and returns it.
+func GetCreateUserMutation() *graphql.Field {
+	return &graphql.Field{
+		Type: types.UserType,
+		Args: graphql.FieldConfigArgument{
+			"firstname": &graphql.ArgumentConfig{
+				Type: graphql.NewNonNull(graphql.String),
+			},
+			"lastname": &graphql.ArgumentConfig{
+				Type: graphql.NewNonNull(graphql.String),
+			},
+		},
+		Resolve: func(params graphql.ResolveParams) (interface{}, error) {
+			user := &types.User{
+				Firstname: params.Args["firstname"].(string),
+				Lastname:  params.Args["lastname"].(string),
+			}
+
+			_, err := postgres.DB.Exec(ADD_USER, user.Firstname, user.Lastname)
+			if err != nil {
+				panic(err)
+			}
+			return user, nil
+		},
+	}
+}