rails 4 activerecord TypeError nil is not a symbol

Question

It appears a table in sql server is placing nil in the select statement. I have no idea how to fix this, and if I switch to any other table, I can easily acquir

Answer 1

While I still believe this is a bug in active record, I was able to get around it with the https://github.com/rails-api/active_model_serializers gem. This gem overrides to_json eliminated the need for the bug code in active record to be called.

anyone else have a better answer?

Updated Controller:

class V1::DealsController < ApplicationController

    def by_mall_id
      deals = Deal.where(mallid: params[:id]).first
      render json: deals, serializer: V1::DealSerializer
    end

end

My new DealSerializer:

class V1::DealSerializer < ActiveModel::Serializer
    attributes :MALLID

    def MALLID
      object.mallid
    end

end

Answer 2

This is because your table doesn't have a primary_key. You can run a migration like this: (this is rails 5 though)

class AddFieldToPosaCode < ActiveRecord::Migration[5.0]
  execute 'ALTER TABLE my_table ADD PRIMARY KEY(my_column)'
end