colander | A serialization/deserialization/validation library | Serialization library

I have made a really long form with the help of colander alchemy and deform.

This form has 100 or so fields and currently the only way I know to add the data back to the database once form is submitted is to explicitly re-define each variable and then add that to the database but there must be a better way.

I want to deserialize MongoDB documents using attr and cattrs. Since noSQL has no fixed schema, I need to point somehow to the attr.ib-s that they could be missed, and not add them to the dict's object in this case.

I used colander before to do this kind of things and it provides a 'missing' parameter in colander.SchemaNode constructor that do exactly this by passing 'colander.drop' as an argument. I'm wondering how to do the same with these libraries, I didn't find anything in the documentation. So:

I'm building a webpage which takes user input and returns a table based on information in my backend. I'm using the web framework Pyramid. My current approach is the following:

1. Create a Colander Schema and a Deform form object that is rendered using a Chameleon template.

2. Once the user hits submit, validate the submission and use the input to generate a list of dictionaries.

3. Encode this result into JSON and feed it to dynatable.js

4. Display the dynatable below my submission form

Steps 3 and 4 are where I'm having an issue. I don't know what I need to do to expose my list of dictionaries to dynatable. I've read the Pyramid Quick Tutorial, so I have an idea of how to do simple AJAX with a JSON renderer, but I have no idea how to implement this into my current situation.

To give a better idea, my function for processing Deform input is as follows (part of the function and template is adapted from the Deform sample provided on the official Github repo):

User Pyramid, Colander, and Deform, I've got a datetime widget.

I want to access the data returned in the following jsonResponse object:

I used form inheritance to create a new form, for instance:

I am new to front-end, I have been looking for hints/relevant solutions in the past few weeks but still no luck. I hope I can solve it out here...I am currently building my first website. I am making a "find recipes" website, since I don't know anything about API call, I created a local Json file which has a few recipes data. The format looks like this:

I've been stuck on this for awhile now. I'm trying to loop through this array so I can perform some calculations but I cannot figure out how to loop through there values. Any suggestions?

I managed to figure out how to get there collection structures but I want to loop through each structure and grab there values as well and thats what I'm stuck on.

Also, I want to refrain from using cfscript if possible as I'm still in the learning stages of learning coldfusion.

Here is my code:

I want to make certain fields in a model made using colander to be optional.
I am familiar with using missing=colander.drop but that only works when SchemaNode is defined.
In case, the field is defined using a custom class, say customeClass = CustomClass(), how to make this as optional?
Below is the snippet: