Add operators : Not Like, Start With, Not Start with, End With, Not …

[absymylyar]

I Added the operators Not Like, Start With, Not Start with, End With, Not End With

[bart-degreed]

Nice addition! A few remarks:

• Do they all translate into SQL or do they execute client-side?
• I believe it would be better to spell out the operator names instead of the abbreviations for clarity
• Unit tests are missing
• Documentation needs to be updated

But I'm quite new on the project, so before putting a lot of work into this, I'd recommend to wait and see what the project owners feel about the new operators.

@maurei thoughts?

[absymylyar]

I've been using those operators for 3 months now on my own project, angular 7 with DevExtrem Datagrid.
I can plug it directly to the API, translating the grid's filter to JsonApi format...

[absymylyar]

I'm working also to use DateTime and TimeSpan as "HasOne" relationship, and make their properties (year, month, day, dayofweek, etc...) available for filtering and sorting.

[bart-degreed]

Superseded by #792.