Rails not passing the DB Query on search form - mysql

Question

Here what looks better, this is the log, its passing the param, but its not passing a query with that param
Started GET "/items?utf8=%E2%9C%93&search=blanca" for 65.34.251.106 at 2016-08-30 03:55:51 +0000
Processing by ItemsController#index as HTML
Parameters: {"utf8"=>"✓", "search"=>"blanca"}
User Load (0.3ms) SELECT "users".* FROM "users" WHERE "users"."id" = ? ORDER BY "users"."id" ASC LIMIT 1 [["id", 3]]
Item Load (0.3ms) SELECT "items".* FROM "items" LIMIT 50 OFFSET 0
Item Load (0.2ms) SELECT "items".* FROM "items" ORDER BY "items"."id" ASC LIMIT 1 OFFSET 0
Rendered items/_items.html.erb (3.2ms)
Rendered items/index.html.erb within layouts/application (4.9ms)
This is the controller:
def index
#items = Item.search(params[:search])
end
and this is the model:
class Item < ActiveRecord::Base
has_many :stocks
attr_accessible :nombre, :espesor, :material, :quantity
accepts_nested_attributes_for :stocks
attr_accessible :stocks_attributes
self.per_page = 50
# def self.search(search)
# Item.where("nombre LIKE ?", "%#{search}%")
# end
def self.search(search_term)
where("nombre LIKE ?", "%#{search_term}%")
end
protected
end
and the search form in the view:
<%= form_tag items_path, :method => 'get', :id => "items_search" do %>
<p>
<%= text_field_tag :search, params[:search], class: "form-control" %>
<%= submit_tag "Search", :name => nil, class: "btn btn-danger" %>
</p>
<div id="items"><%= render 'items' %>
</div>
<% end %>
I have a _items.html.erb file which has the items to render, that part works because no matter my input on the search bar, it always shows all the items
This is the ouput when i try to use .search method in the console
2.3.0 :041 > Item.search("blanca")
NoMethodError: undefined method `search' for #<Class:0x0000000203fc58>
from /usr/local/rvm/gems/ruby-2.3.0/gems/activerecord- 4.2.6/lib/active_record/dynamic_matchers.rb:26:in `method_missing'
from (irb):41
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.6/lib/rails/commands/console.rb:110:in `start'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.6/lib/rails/commands/console.rb:9:in `start'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:68:in `console'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.6/lib/rails/commands.rb:17:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'

Answer 1

Are you sure you defined the class method search in item.rb? Cause the error says that there's no search method defined on the Item class. However, try if the following works for you.
You only want to search if the form is being submitted. You can use the present? method to know if the search term was actually passed.
Modify your controller to
def index
#items = params[:search].present? ? Item.search(params[:search]) : Item.all
end
Note that an object is present only if its not blank. This is handy because if someone enters " " in the form, you shouldn't search for an empty space in the nombre field but display all the records in the items table.
If the form was not submitted, Item.all will be executed.
Modify your class method to
def self.search(search_term)
where("nombre LIKE ?", "%#{search_term}%")
end
You don't need a Item.where because the class Item is the current context on which the where method is called. Note that I have changed the pattern to %#{search_term}% cause you don't always want to match strings ending with some pattern.
Hope this helps!