Selecting null in selection-control causes dependent selection-control to call wrong url

[sdm]

I have 2 selection-controls A and B in my form. B depends on A, so if A changes, B should change too. Both selection-controls have the nullable: true option.

Initially, the selected value in A is null. This causes B to call the following url:

http://localhost/abc/getB/byA/

Then I change the value of A to eg. 2. Logically, B now calls this url:

http://localhost/abc/getB/byA/2

But when I then change the value of A back to null, B still calls the same url:

http://localhost/abc/getB/byA/2 instead of http://localhost/abc/getB/byA/

This causes B to still have available select-options, while it should actually be empty, because no value in A is selected.

[freya]

actions: 1. change logic in field.js (240) 2. provide callback function (clear options) in case of error after ajax call to get options

[freya]

fixed in r1577