Question

I am trying to write active record queries in my model for an advanced search.

I have a Firms model and each firm has many Categories through Categorizations

I have the following built into my search method at the moment.

def find_firms
    firms = Firm.order(:name)
    firms = firms.where("name like ?", "%#{name}%") if name.present?
    firms = firms.categories.find(id: category_id) if category_id.present?
end

My category schema looks like this.

create_table "categories", :force => true do |t|
  t.text     "name"
  t.datetime "created_at", :null => false
  t.datetime "updated_at", :null => false
 end

and my categorizations

 create_table "categorizations", :force => true do |t|
   t.integer  "category_id"
   t.integer  "firm_id"
   t.datetime "created_at",  :null => false
   t.datetime "updated_at",  :null => false
 end

and my search form view

  <div class="field">
    <%= f.label :category_id, "Practice Area" %><br />
    <%= f.collection_select :category_id, Category.order(:name), :id, :name, include_blank: true %>
  </div>

Any ideas what I am doing wrong?

As i keep getting the error:

 undefined method `categories'

Many thanks.

Ross

Answer 1

You are trying to run the categories method on the array returned by firms which will fail. I am assuming you want to return the firms with the given category id.

def find_firms
  firms = Firm.order(:name)
  firms = firms.joins(:categories).
            where(:categories =>{ id : category_id}).uniq if category_id.present?
  firms = firms.where("name like ?", "%#{name}%") if name.present?
end