Compatibility with Rails 5 - attribute_fields

[haslinger]

I forked the demo and updated it to ransack_demo / Rails 5.

The application itself starts, but within the condition group after adding a condition, the attribute field dropdown is missing.

I tried to debug the issue, and found that within the attribute_fields helper the call to the search_fields method returns an empty string.
In the old version (Rails 3.x) the proper html string for the dropdown was returned.

Reason for my findings is that I have exactly the same issue updating my own application to Rails 5 (so it's not specific to the demo app).

[jonatack]

Thanks @haslinger. Would you like to add a PR to update ransack_demo to Rails 5?

[haslinger]

@jonatack Yes, will do so in a few mins.

To document the monkey patches I did to make it Rails 5 compatible:
They are all in the file
https://github.com/haslinger/ransack_demo/blob/rails5/config/initializers/ransack.rb

While the second one
self.attributes << attribute # if attribute.valid?
is basically a bad hack, I believe that the constants for ASC and DESC are truly missing in current Ransack.

[jonatack]

Thanks. The missing ASC and DESC was fixed in this commit.

[jonatack]

Closing in favor of the open issue in Ransack. Thanks again!