In comment_entity_info() the comment module is specifying in "entity keys" that its bundle is "node_type", but there is no corresponding column in the comment table. That makes it impossible to query comment entities by bundle without pulling in the node information that each comment is attached to.
GitHub Issue #:
2046
Recent comments
Glad it works for you! Regarding selecting options, I've just tested the Views Autocomplete Filters module and got it working after I had a look at the README and made sure to use the same...
Can't filter content in a View
You are right, that was it... Now my problem is I would like users being able to select from pre-established options, like a drop down or maybe an autocomplete. For that I would the Autocomplete...
Can't filter content in a View
Here goes the screenshot for the exposed filter config I will try the module you are telling me about. thanks again!
Can't filter content in a View