The parameter filter_query of the delivery api has been improved to check for empty values.

Nested queries are now possible for all filter query types. To access nested attributes you need to use a point as path separator. Examples: <code>seo.description</code>, <code>body.0.teaser_header</code>

Changes in operators

1. gt-int, gt-int: When doing a greater than or less than query it no longer triggers an error when there are non numeric values in the content entries.
2. in: When providing an empty string then the api returns all fields that have empty strings or null values.