app/controllers/graphql_controller.rb
# frozen_string_literal: true
class GraphqlController < ApplicationController
def execute
variables = ensure_hash(params[:variables])
query = params[:query]
operation_name = params[:operationName]
context = {
# Query context goes here, for example:
# current_user: current_user,
}
result = ExampleProjectSchema.execute(
query,
variables: variables,
context: context,
operation_name: operation_name,
)
render json: result
end
private
# Handle form data, JSON body, or a blank value
def ensure_hash(ambiguous_param)
case ambiguous_param
when String
if ambiguous_param.present?
ensure_hash(JSON.parse(ambiguous_param))
else
{}
end
when Hash, ActionController::Parameters
ambiguous_param
when nil
{}
else
raise ArgumentError, "Unexpected parameter: #{ambiguous_param}"
end
end
end