Channel Entries - searching relationship field?

Question

SEE: Channel Entries - possible to search relationship field?

Has anything changed since the above question? I want to list all Channel entries for a given value in a relationship field. Something like this:

search:my_relationship:url_title="foo"

EDIT 1:

I didn't explain my problem properly. My Channel has a grid. The grid has a relationship field. When I loop through the grid entries, I want to apply a search filter to it.

Answer 1

This is easy using Low Search and its Relationships filter. You don't necessarily need a search form, as you can use the Results tag as a drop-in replacement for the channel:entries tag. Then you can use this parameter:

{exp:low_search:results child:rel_field="1|2|3"}

...which will give you all entries that have entry ID 1, 2 or 3 assigned to them as a child.

Or:

{exp:low_search:results child:rel_field="foo"}

...which will give you all entries that has the entry with URL-title 'foo' assigned to them as a child.

The reverse is also possible:

{exp:low_search:results parent:rel_field="4|5|6"}
{exp:low_search:results parent:rel_field="bar"}