Graphql with mutation spring boot

Question

My schema file is

type Mutation { createCustomer(name: String!, email: String!, product: [Product]): Customer } input Product { id: ID! name: String! price: Int } interface Person { id: ID! name: String! email: String! } type Customer implements Person { id: ID! name: String! email: String! product: [Product] }

I want to insert customer detail here which has product list as input. My query is

mutation { createCustomer( name: "kitte", email: "[email protected]", product: [ { name: "soap", price: 435, } ] ) { id name email product{name} } }

But I am getting exception

{ "data": null, "errors": [ { "validationErrorType": "WrongType", "message": "Validation error of type WrongType: argument value ArrayValue{values=[ObjectValue{objectFields=[ObjectField{name='name', value=StringValue{value='dars76788hi'}}, ObjectField{name='price', value=IntValue{value=123}}]}, ObjectValue{objectFields=[ObjectField{name='name', value=StringValue{value='darr'}}, ObjectField{name='price', value=IntValue{value=145}}]}]} has wrong type", "locations": [ { "line": 5, "column": 5 } ], "errorType": "ValidationError" } ] }

I don't understand what is the error. And how to pass list to mutation. I have referred some examples but not able to insert product as list.

Have you tried to get some product fields in your mutation, like mutation { createCustomer(...) { id, name, email, product {name} } }? — Andrija Ćeranić
– Andrija Ćeranić, Commented Nov 13, 2017 at 17:21

Andrija Ćeranić · Accepted Answer · 2017-11-14 11:33:29Z

7

Make sure you are passing the right type of objects to your mutation. GraphQL needs separate types for input fields. In your schema, Product types should be something like this and you should change the mutation accordingly.

type Product { id: ID! name: String! price: Int } input ProductInput { name: String! price: Int } input CustomerInput { ... products: [ProductInput] }

There are couple of very useful examples in the docs, see Mutations and Input Types

edited Nov 14, 2017 at 11:33

answered Nov 14, 2017 at 11:27

Andrija Ćeranić

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5 Comments

shagun Over a year ago

It is storing customer to db. but not able to return product by products { name }

shagun Over a year ago

mutation Customer { createCustomer(name: "trrth", email: "night", product: [{id:"1", name: "thrh", price: 123}]) { id name email products { id name } } }

Andrija Ćeranić Over a year ago

It should be product {id, name} based on your schema. Watch for single product vs products and add a coma between id and name.

Andrija Ćeranić Over a year ago

Never mind the comas :) I see that you were just writing quickly. You are getting Wrong type error so try to add type Product {...} in addition to your input type.

shagun Over a year ago

Thanks for your answer. I have resolved this by taking input type for mutation and returning type instread of input type. So i am not getting type cast error now.

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