Ransack search error | 易学教程

问题

I am using Rails 4.2.5, Ruby 2.2, ransack. I am trying to implement search functionality using Ransack. I have something like:

These code are in abc_controller.rb:

def checked_users
  emails = ["abc@abc.com", "a@a.com", "b@b.com"]
  users_list = User.where("email in (?)", emails)
  @q = users_list.ransack params[:q]
end

These are the code in checked_users.html.haml: (Ignore the url path here. Its correct, for now I have changed it)

= search_form_for @q, url: checked_users_path(some_id: id) do |form|
  = form.text_field :user_name_or_user_email_cont, placeholder: 'Name or email', class: 'form-control'

In routes.rb:

resources :xyz do
  resources :mno do
    get 'checked_users', controller: 'abc', action: 'checked_users'
  end
end

With these code I am getting an error:

ActionView::Template::Error (undefined method `user_name_or_user_email_cont' for Ransack::Search<class: User, base: Grouping <combinator: and>>:Ransack::Search):

Not sure why I am getting this error.

回答1:

Since you're searching for users, I think you can get rid of the user prefix on the text field.

For example, you have:

form.text_field :user_name_or_user_email_cont, placeholder: 'Name or email', class: 'form-control'

Changing it to something like this should work:

form.text_field :name_or_email_cont, placeholder: 'Name or email', class: 'form-control'

Also, I would consider using ransack's search_field instead of text_field if you can.

Here's some additional information. I believe you only need to use a prefix like user if you want to search associations. For example, let's say you have a user and toy model like this:

class User
  # attribute: first_name, String
  # attribute: last_name, String
  has_many :toys
end

class Toy
  # attribute: name, String
end

Now, you can perform a ransack search on the user or the user's toys. Here's how you'd use search_field to do this. In this case, first_name and last_name refer to the user, and toys_name refers to a toy's name.

form.search_field :first_name_or_last_name_or_toys_name_cont, placeholder: "First Name, Last Name, or Toy's Name", class: 'form-control'

来源：https://stackoverflow.com/questions/48274694/ransack-search-error

标签

ruby-on-rails-4

ransack