How to get ONLY data properties? - Smart UI Components

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This topic has 11 replies, 3 voices, and was last updated 5 years, 2 months ago by admin.

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August 20, 2019 at 1:05 am #100206

admin
Keymaster

How can I get an object with ONLY the data properties?

Example:

const app = new Smart.App(
{
// Note: data can only be nested one-deep!
// As well, event functions cannot be nested!
data: {
enrollmentNew: {
courseID: ‘test123’,
loginName: ‘jon@example.com’,
studentID: ‘123test’
}
}
}
);
Since I have each form input bound to a property of data.enrollmentNew, I thought it might be neat to use it to create JSON for submission to backend using Fetch/ajax.
So, I used e.g. attrsForSubmit = Object.assign({}, app.data.enrollmentNew) (to get only own properties without ES7 .assign() or polyfill).
However, I find there are “extra” properties, such as name, propertyName, etc. and of course that doesn’t make my backend happy.
<hr />
In general, I find the documentation – while extensive – lacking – particularly on basics. I find I have to do a LOT of experiments to guess how this stuff works. For example, I find NO comprehensive listing of functions for each object. There is SOME information buried throughout the examples and a bit in the (ALSO buried) “framework” section of the docs. If I could just easily look-up the functions in each object, (especially fundametal “framework” type objects!) it would be a HUGE improvement. Am I missing something?

August 20, 2019 at 1:06 am #100207

admin
Keymaster

FWIW, for now I revert to gathering input values using a little formToObj function that goes through and collects input, select, textarea values from the form…

August 20, 2019 at 3:50 am #100208

admin
Keymaster

Hi jtara,
We will consider your comments about our documentation and framework. About the listing of functions of objects – we document only built-in functions, not all inherited from HTMLElement.
Regards,
George
Smart HTML Elements Team
https://www.htmlelements.com

August 21, 2019 at 6:28 pm #100221
admin
Keymaster
I think you missed the point. Sorry, I should not have mixed comments about the documentation with comments about Observables.
So, apparently, app.data items are Observables.
I want to be able to enumerate through e.g. app.data.enrollmentNew so that I can do something with all of the key/value pairs.
But I find that Observable objects are polluted with many additional properties that are NOT the properties that I defined in app.data.enrollmentNew. This makes it fairly useless for many purposes.
How can I iterate through ONLY the properties that I defined?
boundAttrs.keys:
<div class=”console-view-object-properties-section object-value-array source-code expanded”>
<div class=”tree-outline-disclosure tree-outline-disclosure-hide-overflow”>
1. 0: ”name”
2. 1: ”shortName”
3. 2: ”description”
4. 3: ”address”
5. 4: ”city”
6. 5: ”stateCode”
7. 6: ”zipCode”
8. 7: ”province”
9. 8: ”country”
10. 9: ”postalCode”
11. 10: ”codes”
12. 11: ”tags”
13. 12: ”notes”
14. 13: ”annex”
15. 14: ”hasOwnProperty”
16. 15: ”isPrototypeOf”
17. 16: ”propertyIsEnumerable”
18. 17: ”toString”
19. 19: ”toLocaleString”
20. 20: ”_canNotify”
21. 21: ”notifyFn”
</div>
</div>
August 21, 2019 at 6:30 pm #100222

admin
Keymaster

Sorry. That did not paste as I expected! (And there doesn’t seem to be any way to edit a post?)
boundAttrs.keys: (23) [“name”, “shortName”, “description”, “address”, “city”, “stateCode”, “zipCode”, “province”, “country”, “postalCode”, “codes”, “tags”, “notes”, “annex”, “hasOwnProperty”, “isPrototypeOf”, “propertyIsEnumerable”, “toString”, “valueOf”, “toLocaleString”, “_canNotify”, “notifyFn”, “propertyName”]

August 21, 2019 at 6:43 pm #100223

admin
Keymaster

To be more clear:
const boundAttrs = app.data.schoolNew;
console.info(‘boundAttrs’, boundAttrs);
console.info(‘boundAttrs.keys:’, Object.keys(boundAttrs));
for (const key of Object.keys(boundAttrs)) {
console.log(key: ${key} hasOwnProperty: ${boundAttrs.hasOwnProperty(key)});
}
This gives me the list of keys from above, and after adding check for own property, they are all own property.
So, how do I get JUST the bound variables from the Proxy object, WITHOUT pollution like “propertyName”, etc?
I guess I can filter out functions, and what is left will just be my properties? Isn’t there some function to do that for me? It would seem very common to want to iterate through bound variables, but there seems no convenient way to do it.

August 21, 2019 at 6:45 pm #100224

admin
Keymaster

Ugh! This forum is IMPOSSIBLE! That code did not paste right. The forum did not like my backticks!
The line in my “for” is: (I substitute <backtick> for actual backtick below, because the forum doesn’t like backtick…)
console.log(<backtick>key: ${key} hasOwnProperty: ${boundAttrs.hasOwnProperty(key)}<backtick>);

August 21, 2019 at 6:52 pm #100225

admin
Keymaster

Well, ignoring functions won’t do it. Because the Proxy object has e.g. _canNotify which is boolean, propertyName string, notifyFn object.
I could filter these out explicitly (along with functions) after copying with Object.assign() but then I have to worry with each future release what has been added that I have to filter out.
What am I missing here? What is the use of of this if I cannot iterate my own properties that I added in app.data without pollution? I need to make a separate redundant list of my key names, it is a royal pain.

August 21, 2019 at 7:03 pm #100226

admin
Keymaster

I have a workaround – I actually already had the keys in my own object, which I used to initialize app.
// Note: data can only be nested one-deep!
// As well, event functions cannot be nested!
const smartData = {
enrollmentNewSubmit: newEnrollmentSubmit,
enrollmentNew: {
courseID: ”,
loginName: ”,
studentID: ”
},
schoolNewSubmit: newSchoolSubmit,
schoolNew: {
name: ”,
shortName: ”,
description: ”,
address: ”,
city: ”,
stateCode: ”,
zipCode: ”,
province: ”,
country: ‘US’,
postalCode: ”,
codes: ”,
tags: ”,
notes: ”,
annex: ”
}
};
So, I can e.g.
for (const key of Object.keys(smartData.schoolNew)) {
console.log(<backtick>key: ${key} hasOwnProperty: ${boundAttrs.hasOwnProperty(key)} type: ${typeof boundAttrs[key]}<backtick>);
}

So, I can iterate through that way and get only my own added properties.
Please add some easy way to do this in the future, or let me know what I am missing if it already exists.

August 28, 2019 at 9:14 am #100260

admin
Keymaster

Hi jtara,
With the Smart ver. 4.3.0, Smart.App is extended with “jsonData” and “formData” properties. “jsonData” gets the “data” without the extended observable properties. “formData” returns FormData object.
Regards,
George
Smart HTML Elements Team
https://www.htmlelements.com

August 28, 2019 at 4:14 pm #100263

admin
Keymaster

4.3 has an app.toJSON() method – cannot find app.jsonData property though.

August 29, 2019 at 2:14 pm #100270

admin
Keymaster

Sorry, for the typo. It is toJSON(), not jsonData in 4.3.
Regards,
George
Smart HTML Elements Team
https://www.htmlelements.com
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