Finding the Mutation Object

[kencohere]

In Guide to build Meal Delivery App using Hypi’s low code API there are a couple of custom functions that are to be added to the mutation object, but I do not yet know where to find that.

[zcourts]

@kencohere I believe that example includes all the custom functions right there in the schema.

So the calculateAmount function is given in the post. Hypi has support for “inline” scripts using Groovy, see the docs here.

@asa

calculateAmount(a: ID, b:ID):Json @tan(type:Groovy, inline: """
def price = gql(\"""{get(type:PurchaseOrder,id:"$a"){...on PurchaseOrder{meal{price}}}}\""").data.get.meal.price
def quantity = gql(\"""{get(type: PurchaseOrder,id:"$a"){...on PurchaseOrder {quantity}}}\""").data.get.quantity
float amount = (float)price * (float)quantity
def user = gql(\"""{get(type: User,id:"$b"){...on User{user{username}}}}\""").data.get.user.username
return upsert([
          PurchaseOrder: [
             orderAmount: amount,
             username: user,
             hypi:
                [
                 id: a
                ]         
            
          ]
        ]
    )       
""")