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OndrejKunc / flutter_dynamic_forms

A collection of flutter and dart libraries allowing you to consume complex external forms at runtime.
MIT License
203 stars 59 forks source link

Get Whole form in JSON with changed value #73

Open sushil7271 opened 4 years ago

sushil7271 commented 4 years ago

Hi, Is there any way I can get the whole form with values changed by the user? In my case, I have to maintain the version of the forms with changed data. Thank you

OndrejKunc commented 4 years ago

Hi,

The preferred way to collect data from the form is via the:

List<FormItemValue> data = formManager.getFormData()

As described in readme:

It contains a list of all the properties which were marked as a mutable in a component parser definition. In default components those are the properties that are expected to be changed by a user. Each item contains id of the source element, property name, and property value. To submit the form you usually want to serialize this list and send it back to your server.

This was useful in our projects because we didn't want to send the whole form back (because it is a lot of data that server already knows about) so we were sending only those triplets.

Unfortunately, there is no functionality of serializing the model tree back to the JSON - this library cares only about deserialization. However, I think this is achievable without any modification of the library. You just need your root FormElement and use the Map<String, Property> properties property to recursively traverse the whole model tree and create a JSON document with the updated values.

sushil7271 commented 4 years ago

Thank you for your response. Could you please help me to achieve this with one example.