Add ability to search Object columns

[ssamuli]

As requested in issue #720

What do you think, is this something you were looking for?

[natanrolnik]

OMG this is fantastic!!!
This is good, but considering we are dealing with this, do you think we could have does not contain, greater than/greater than or equal to, less than/less than or equal to? That would be perfect!!
If not, we can merge and improve it later.

[oferRounds]

@ssamuli - THANK YOU, just saw it now, looks awesome! That would really be useful!

[ssamuli]

@natanrolnik good idea. OK, now this should cover all.

[ssamuli]

@oferRounds happy to be of help!

[natanrolnik]

Interesting, I didn't know about the query['equalTo'](..., ...) syntax...

[ssamuli]

It's an old javascript feature, I'm just accessing the function by its name through bracket notation https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Property_Accessors#Bracket_notation

[natanrolnik]

Good to know! Thank you.

[natanrolnik]

@ssamuli thanks once again for your contribution, this is amazing. I'm sorry to be picky here, but I think it's important to get it right before merging - I have two notes:

1 - the key exists and key does not exist are not working for me, or at least I don't understand how I should write the key. Not only that, for these options, it doesn't save the state when I open the Filter popup again.

I guess the problem is in the following code:

let compareTo = JSON.parse(filter.get('compareTo'));
     for (let key of Object.keys(compareTo)) {

And I guess you need a function different than:
function addQueryConstraintFromObject(query, filter, constraintType) {

2 - Do you think you could add a exists and does not exist option also, being the first ones, for the object itself, and not for the keys? I mean, if I want to search for Parse Object where a object column exists or not, in this current implementation it's not possible.

[ssamuli]

1. Key exists and does not exist works with {"key.im.looking.for":1} for example, did you try that? Should work, at least it did last night when I tried it.

2. Sure, I'll add those too.

[natanrolnik]

I didn't try this way, but I would expect it to work just with a plain string. The example you gave requires understanding how the underlying code works (now I understand why it works). That's why I suggested a different function to modify the query that could handle only a string and not a JSON object for key exists and key does not exist.

[ssamuli]

Yes it's a bit tricky to use but it's kind of consistent with how the rest of the object search works, that's why I thought it was acceptable. I'll change that to work with strings as you suggested.

[ssamuli]

There you are 🙂

[ssamuli]

Btw. would be great feature if those search options had placeholders showing the user how the input should look like. Not just for this but for everything.

[natanrolnik]

Tested now and it's perfect. Let's 🚢 it!
Thanks @ssamuli!

[ssamuli]

Thank you! 🎉

[natanrolnik]

Closes #720