mongodb form_subdocument overwrite stopped working after updates to current flask/ flask-admin/ flask-mongoenine

[Bastian-Kuhn]

I had to Update the Flask etc. Modules in my Open-Source Project.
One Problem was that I had to replace flask-mongoengine with:
https://github.com/idoshr/flask-mongoengine

So when switching from old to new and reverse, I can reproduce it to work and stop working.
Sadly, I was unable to find out, which project's fault is that nor to fix it.
Even checked the last commit's every and found nothing which could have done it.

Working Versions:
Flask 2.1.2
Flask-Admin: 1.6.0
flask-mongoengine 1.0.0
wtforms 3.0.1

Not working:
Flask 3.0.0
Flask-Admin 1.6.1
flask-mongoengine forkgit@master
wtforms 3.1.1

The Problem is, that the form_widget_args, form_overwrite etc. for the subdocuments are not applied,
I can even add random field names etc. without error, only on the first level I get error messages when the field is wrong.

That's one example from my Code:

form_subdocuments = {
        'conditions': {
            'form_subdocuments' : {
                None: {
                    'form_widget_args': {
                        'hostname_match': {'style': 'background-color: #2EFE9A;' },
                        'hostname': { 'style': 'background-color: #2EFE9A;' },
                        'tag_match': { 'style': 'background-color: #81DAF5;' },
                        'tag': { 'style': 'background-color: #81DAF5;' },
                        'value_match': { 'style': 'background-color: #81DAF5;' },
                        'value': { 'style': 'background-color: #81DAF5;'},
                    },
                    'form_overrides' : {
                        'hostname': StringField,
                        'tag': StringField,
                        'value': StringField,
                    },
                    'form_rules' : [
                        rules.FieldSet(('match_type',), "Condition Match Type"),
                        rules.HTML(divider % "Match on Host"),
                        rules.FieldSet(
                            ('hostname_match', 'hostname', 'hostname_match_negate'), "Host Match"),
                        rules.HTML(divider % "Match on Attribute"),
                        rules.FieldSet(
                            (
                                'tag_match', 'tag', 'tag_match_negate',
                                'value_match', 'value', 'value_match_negate',
                            ), "Attribute Match"),
                    ]
                }
            }
        },
        'outcomes' : {
            'form_subdocuments' : {
                None: {
                    'form_widget_args': {
                        'rule_template' : {"rows": 10},
                    },
                }
            }
        }
    }

And that's the Model for it:

#   .-- Checkmk BI Aggregations

class BiAggregationOutcome(db.EmbeddedDocument):
    """
    BI Aggregation
    """
    description = db.StringField()
    rule_template = db.StringField()



class CheckmkBiAggregation(db.Document):
    """
    BI Aggregation
    """
    name = db.StringField(required=True, unique=True)

    condition_typ = db.StringField(choices=rule_types)
    conditions = db.ListField(field=db.EmbeddedDocumentField(document_type="FullCondition"))
    render_full_conditions = db.StringField() # Helper for Preview

    outcomes = db.ListField(field=db.EmbeddedDocumentField(document_type="BiAggregationOutcome"))
    render_cmk_bi_rule = db.StringField()
    last_match = db.BooleanField(default=False)
    enabled = db.BooleanField()
    meta = {
        'strict': False
    }
#.

Because of the flask-mongoengine version switch, I had to change ListFields to have the field= param, and the EmbeddedDocuments to have the document_type.
Maybe this is related.

Thanks for any help.

[Bastian-Kuhn]

For others with the same Problem, found a solution/ workaround. You must replace None with '' to make it work again.

[samuelhwilliams]

I am closing this issue as we're removing support for flask-mongoengine in the next release, because that library is no longer being maintained and is incompatible with recent versions of our core dependencies (eg flask, wtforms, etc).

[Bastian-Kuhn]

@samuelhwilliams I'm I right that I need to migrate to the pymongo module then?

[samuelhwilliams]

If you want to use the upcoming releases of Flask-Admin, that would be my recommendation. I'd be very interested to hear about your experience migrating across - if it's painful, if/what features are missing that we may need to add to pymongo support, etc. pymongo is still seeing regular updates so I think we'd be keen to make sure everything that people need/want to use mongo with Flask-Admin is available there.

[Bastian-Kuhn]

@samuelhwilliams I definitely need to migrate, I heavily use the mongoengine models in this flask-admin based project https://github.com/kuhn-ruess/cmdbsyncer . I also use a lot of Embedded Documents and Styling like this:
(See the first post here)
If the forum_subdocuments worked like before, it would be a big relive. Otherwise this would be the biggest pain. But managable. Besides that, I'm hoping to redefine the Models with the same names, will provide them with access to the existing data. A way for embedded documents should there be also, in the end it has to be written to MongoDB anyway.