Unable to call Graphql API using input parameters - ruby

Question

I'm able to call a graphql api by passing in the input directy like this
mutation {
createUser(input: {
email: "user+2#example.com",
password: "Password123!",
passwordconfirmation: "Password123!",
firstName: "Richard",
lastName: "James"
}){
user{
firstName
lastName
email
}
}
}
But if I pass it using input params like this
mutation createUser($input: CreateUserInput!) {
createUser(input: $input){
user{
firstName
lastName
email
}
}
}
I get this error
{
"errors": [
{
"message": "Variable $input of type CreateUserInput! was provided invalid value for first_name (Field is not defined on CreateUserInput), last_name (Field is not defined on CreateUserInput)",
"locations": [
{
"line": 1,
"column": 21
}
],
"extensions": {
"value": {
"passwordconfirmation": "Password123!",
"password": "Password123!",
"email": "user#example.com",
"first_name": "Richard",
"last_name": "James"
},
"problems": [
{
"path": [
"first_name"
],
"explanation": "Field is not defined on CreateUserInput"
},
{
"path": [
"last_name"
],
"explanation": "Field is not defined on CreateUserInput"
}
]
}
}
]
}
create user mutation
module Mutations
class CreateUser < Mutations::BaseMutation
argument :email, String, required: true
argument :password, String, required: true
argument :passwordconfirmation, String, required: true
argument :first_name, String, required: false
argument :last_name, String, required: false
field :user, Types::UserType, null: true
field :token, String, null: true
def resolve(args)
user = User.new(password: args[:password], password_confirmation: args[:passwordconfirmation], email: args[:email])
user.build_profile
user.save
if args[:first_name] || args[:last_name]
user.profile.first_name = args[:first_name]
user.profile.last_name = args[:last_name]
user.profile.save
end
# current_user needs to be set so authenticationToken can be returned
context[:current_user] = user
MutationResult.call(
obj: { user: user },
success: user.persisted?,
errors: user.errors
)
rescue ActiveRecord::RecordInvalid => e
GraphQL::ExecutionError.new(
"Invalid Attributes for #{e.record.class.name}: " \
"#{e.record.errors.full_messages.join(', ')}"
)
end
end
end
CreateUserInput
input: CreateUserInput!
Autogenerated input type of CreateUser
type CreateUserInput {
email: String!
password: String!
passwordconfirmation: String!
firstName: String
lastName: String
clientMutationId: String
}

Answer 1

Your error message already tells you what's up :)
{
"errors": [
{
"message": "Variable $input of type CreateUserInput! was provided invalid value for first_name (Field is not defined on CreateUserInput), last_name (Field is not defined on CreateUserInput)",**
}
...
That means, that your CreateUserInput type doesn't match your payload. You haven't posted your CreateUserInput, but it appears that it contains neither first_name nor last_name. I assume CreateUserInput looks something like this:
class CreateUserInput < BaseInput
argument :email, String, required: true
argument :password, String, required: true
argument :password_confirmation, String, required: true, camelize: true
argument :first_name, String, required: false, camelize: true
argument :last_name, String, required: false, camelize: true
end
Note that camelize: true is set per default, and results in fields like firstName and lastName. So your input varible must now look like so:
input: {
"firstName": "First",
"lastName": "Last",
...
}
If you wish to stick with first_name you must pass camelize: false and change your payload accordingly.
Inspect your GraphQL API using a documentation explorer to see what kind of fields your API expects and how they should be named.