Relay flavoured graphql mutation validation errors - graphql

Question

I've greated a simple relay flavoured mutation that works just fine. I've got a simple client side component that commits the mutation with the required data.
My question is how do I send back multiple errors to the client? Currently I can simply throw an error (or reject a promise) in mutateAndGetPayload and I will receive an error on the client side, but this currently only works with a string message. Should I simply reject the promise with a JSON string of an errors array? Or is there a better way?
const createCashAccountMutation = mutationWithClientMutationId({
name: 'CreateCashAccount',
inputFields: {
name: {
type: new GraphQLNonNull(GraphQLString),
description: 'Cash account name'
},
code: {
type: GraphQLString,
description: 'Optional code'
},
businessId: {
type: new GraphQLNonNull(GraphQLString),
description: 'Business ID'
},
currencyId: {
type: new GraphQLNonNull(GraphQLString),
description: 'Currency ID'
},
isActive: {
type: new GraphQLNonNull(GraphQLInt)
}
},
outputFields: {
name: {
type: GraphQLString,
resolve: (payload) => payload.name
},
code: {
type: GraphQLString,
resolve: (payload) => payload.code
},
businessId: {
type: GraphQLString,
resolve: (payload) => payload.businessId
},
currencyId: {
type: GraphQLString,
resolve: (payload) => payload.currencyId
},
isActive: {
type: GraphQLString,
resolve: (payload) => payload.isActive
}
},
mutateAndGetPayload: async (options) => {
throw 'wtf';
return options;
}
});
Update 1.
I've come up with the following example:
const graphQLCashAccount = new GraphQLObjectType({
name: 'cashAccount',
fields: {
name: {
type: GraphQLString,
resolve: (payload) => payload.name
},
code: {
type: GraphQLString,
resolve: (payload) => payload.code
},
businessId: {
type: GraphQLString,
resolve: (payload) => payload.businessId
},
currencyId: {
type: GraphQLString,
resolve: (payload) => payload.currencyId
},
isActive: {
type: GraphQLString,
resolve: (payload) => payload.isActive
}
}
});
const graphQLErrors = new GraphQLList(new GraphQLObjectType({
name: 'errors',
fields: {
key: {
type: GraphQLString,
resolve: (payload) => payload.key
},
message: {
type: GraphQLString,
resolve: (payload) => payload.message
}
}
}));
const graphQlInput = new GraphQLInputObjectType({
name: 'data',
fields: {
name: {
type: new GraphQLNonNull(GraphQLString),
description: 'Cash account name'
},
code: {
type: GraphQLString,
description: 'Optional code'
},
businessId: {
type: new GraphQLNonNull(GraphQLString),
description: 'Business ID'
},
currencyId: {
type: new GraphQLNonNull(GraphQLString),
description: 'Currency ID'
},
isActive: {
type: new GraphQLNonNull(GraphQLInt)
}
}
});
const createCashAccountMutation = mutationWithClientMutationId({
name: 'CreateCashAccount',
inputFields: {
data: {
type: graphQlInput
}
},
outputFields: {
data: {
type: graphQLCashAccount,
resolve: (payload) => payload.data
},
errors: {
type: graphQLErrors,
resolve: (payload) => payload.errors
}
},
mutateAndGetPayload: async (options) => {
const payload = {
errors: [{ key: 'asd', message: 'asd failed' }],
data: options
};
return payload;
}
});
This will actually resolve the transaction and simply return 2 fields, a data field and an errors field. One of them will be populated.
Is this a better approach? I'm stumped on how I should apply the update in Relays fatquery though.
Update 2.
Relay Mutation client side example.
export class NewCashAccountMutation extends Relay.Mutation {
getMutation () {
return Relay.QL`mutation {
createCashAccount
}`;
}
getVariables() {
return { data: this.props.cashAccount };
}
getFatQuery() {
return Relay.QL`
fragment on CreateCashAccountPayload {
data, errors
}
`;
}
getConfigs() {
return [{
type: 'FIELDS_CHANGE',
fieldIDs: {
data: this.props.cashAccount.id,
},
}];
}
}