constructing a mongo doc using pymodm from_document - mongodb

Question

I am trying to construct a pymodm document from a python dictionary using from_document api. I am receiving a error "ValueError: Unrecognized field name 'prim_key'"
Here is the sample code that I have written to make this happen with minimum code.
from pymodm import connect, EmbeddedMongoModel, MongoModel, fields
from pymodm.errors import ValidationError, ConfigurationError
from pymongo.write_concern import WriteConcern
import pprint
from datetime import datetime
class sample_doc(MongoModel):
prim_key = fields.CharField(primary_key=True)
another_field = fields.CharField()
class Meta:
write_concern = WriteConcern(j=True)
connection_alias = 'pymodm-tester'
connect("mongodb://localhost:27017/pymodm-tester", alias="pymodm-tester")
q = {'prim_key' : 'prim_val', "another_field" : "another_filed1" }
sample_doc.from_document(q).save()

Answer 1

In the docs:
document: A Python dictionary describing a MongoDB document. Keys
within the document must be named according to each model field’s
mongo_name attribute, rather than the field’s Python name.
It looks that, in order to instantiate a Model as you try, it needs to be specified the mongo_name Field. It would work for you something like:
class sample_doc(MongoModel):
prim_key = fields.CharField(primary_key=True, mongo_name="prim_key")
another_field = fields.CharField(mongo_name="another_field")
class Meta:
write_concern = WriteConcern(j=True)
connection_alias = 'pymodm-tester'