问题
I have a boolean attribute (published) in my model book and I wish to filter all books using checkboxes on that value.
class Book < ActiveRecord::Base
attr_accessible :published
end
That means I'd like something like eq_any but for true or false. Is there a way to do this using Ransack?
UPDATE
I'd like users to be able to select only published books, only unpublished books and any book. So a single checkbox won't do.
回答1:
I have solved this by using a select list with three options: "All", "Yes" and "No"
= select :q, :published_true, [['Yes', 1], ['No', 0]], { include_blank: 'All', selected: params[:q] ? params[:q][:published_true] : '' }
The query string for published_true will look like this:
q[published_true]=1 1 will return published books
q[published_true]=0 0 will return unpublished books
q[published_true]= blank – will return both published and unpublished books
回答2:
Renan, you can do this using the 'true' and 'false' predicates (other predicates are listed in the documentation link below).
In your form, your checkbox code would look something like this:
<%= f.checkbox :published_true %>
<%= f.checkbox :published_false %>
So, in your form, checking the first checkbox (published_true) would return all books where published is true, checking the second box (published_false) would return all books where published is false (unplublished), and submitting the form without checking either box would return all books.
More information can be found in the documentation here: https://github.com/ernie/ransack/wiki/Basic-Searching
回答3:
The choosen answer works fine, but, at least in 2016, something better can be written. Leveraging on the "eq" functionality allows to remove some configuration. The final result is:
<%= f.select :published_eq, [['Yes', true], ['No', false]], include_blank: 'All' %>
来源：https://stackoverflow.com/questions/17490458/eq-any-for-boolean-attributes-ransack