Ruby Graphql: Found two visible definitions for UpdateTransactionInput

I'm using the graphql gem and I'm having issue to create a mutation to update a recor.

This is where the mutation type is first defined:

module Types
  class MutationType < Types::BaseObject
    field :createTransaction, mutation: Mutations::CreateTransaction
    field :updateTransaction, mutation: Mutations::UpdateTransaction
  end
end

This is the mutation itself:

# app/graphql/mutations/update_transaction.rb
module Mutations
  class UpdateTransaction < Mutations::BaseMutation
    graphql_name "UpdateTransaction"
    
    argument :id, ID, required: true
    argument :input, Inputs::UpdateTransactionInput, required: true

    def resolve(input:)
      transaction = Transaction.find(input[:id])
      (...)
    end
  end
end

The update input:

module Inputs
  class UpdateTransactionInput < Types::BaseInputObject
    graphql_name "UpdateTransactionInput"
    description "Attributes for updating a transaction"

    puts "Loading Inputs::UpdateTransactionInput" # Debug line

    argument :id, ID, required: true
    argument :due_date, String, required: true
    argument :description, String, required: true
    argument :amount, Float, required: true
  end
end

But I keep getting the error: Found two visible definitions for UpdateTransactionInput: #<Class:0x0000000106dae998>, Inputs::UpdateTransactionInput" even thouhg I'm pretty sure it's only defined one.

I'm querying it like this:

mutation UpdateTransaction($input:UpdateTransactionInput!) {
    updateTransaction(input: $input) {
      id
      dueDate
      description
      amount
      __typename
    }
    __typename
  }

Thoughts on what I am doing wrong here?

I already tried to rename the UpdateTransactionInput to something totally different and it keeps saying the same error even though the UpdateTransactionInput isn't defined in the code anymore.

The duplication occurs because your base_mutation.rb file is inheriting from GraphQL::Schema::RelayClassicMutation. This causes automatic generation of input type files.

If you want to use your own custom input files, you should change the inheritance to GraphQL::Schema::Mutation. This will allow you to manually define your input types without the automatic generation and without throwing error of duplication.