Server responds with 500 when filter contains empty conditions array

[vyacheslav-pushkin]

Environment

• Platform version: 7.1.3
• Addon version: 7.1.1

Description of the bug or enhancement

• Minimal reproducible example

Send a request to the entity search endpoint with the filter parameter containing an empty conditions array:

filter: {"conditions":[]}

For example:

GET http://localhost:8080/petclinic/rest/v2/entities/petclinic_Owner/search?view=_local&sort=-updateTs&limit=10&offset=0&filter=%7B%22conditions%22%3A%5B%5D%7D&returnCount=true

• Expected behavior

Same as when making a request without a filter parameter: server returns records without applying filtering.

• Actual behavior

Server responds with 500 Internal Server Error