`distinct_on` support

[Steven Bell]

I have been trying to figure out how to get the distinct_on variable working.

I played around with customBuildFields and queries, but I have been coming up short.

There is this answer on StackOverflow, which doesn't work.

Has anyone ever come across this and got it working?

[Bharat Kashyap]

Extend the default buildVariables function

• Use the existing buildVariables.js and extend it like so:

    // buildGetListVariables 
    // L24 
   const { customFilters = [] } = params;
     
    // ...
    /** Setting "distinct_on" to be the `filters` object attribute to be used inside RA
     * and setting to a `distinct_on` variable
     * and removing from the filter object
     */

    const distinctOnField = "distinct_on";
    const { distinct_on = "" } = filterObj;
    filterObj = omit(filterObj, [distinctOnField]);
    
    // ... 
    
    // L150 
     if (params.sort) {
      result["order_by"] = set(
        {},
        params.sort.field,
        params.sort.order.toLowerCase()
      );
    }
    
    // Add the "distinct_on" attribute to the result object
    if (distinct_on) {
      result["distinct_on"] = distinct_on;
    }

• Use this to pass to your buildHasuraProvider

Here's the implementation - customVariables.js and app.js

[Steven Bell]

Thanks!

Would the maintainers be open to adding this to the library? I would be more than happy to open a PR.

Edit: I have a form with the changes here. Will put in a PR if anyone else seems interested these changes.

[Bharat Kashyap]

@praveenweb: Adding distinct_on support to the library

[arjunyel]

@bell-steven hey friend, could you please open a PR with your distinct_on changes? Thank you so much!

[Steven Bell]

@arjunyel The repo has changed quite a bit since those changes, will have to try and find the time to rebase.

[Crates]

I'd like to throw in my support for this to be part of the library, as well. It's a pretty valuable addition. Let us know if you find time to include it, please!