Questions tagged [flask-marshmallow]
106 questions
2
votes
2 answers
How can I load only a foreign key into Nested fields using Marshmallow / SQLAlchemy
I'm very new to Flask-Marshmallow / Flask-SQLAlchemy and I'm trying to set up my own REST API with flask and mysql.
Here is the payload I'm trying to post. I want to be able to only send the ID and exclude all other fields:
{
"code": "FG034",
…
myko324
- 21
- 3
2
votes
2 answers
Call marshmallow validated GET endpoint with List parameter
I have a marshmallow schema validation like this:
class MyFilterSchema(Schema):
ids = fields.List(fields.Str(validate=non_empty), required=True)
Then in my endpoint I call the schema validation:…
Eisen
- 115
- 2
- 12
2
votes
1 answer
Many to Many relationship Flask sqlalchemy and marshmallow
Suppose i have 2 tables , Table 1 consist of users info and Table 2 consist of Branch info.
table 1 and table 2 is related to each other by many to many relationship.
e.g 1 user can work in multiple branches and 1 branch can have multiple users.
so…
Gau Rav
- 357
- 3
- 13
2
votes
0 answers
How to group fields when serialising object with Marshmallow?
Problem
How to group fields together when serialising a flat-structured SQLAlchemy object with Marshmallow without changing the flat data structure in the background?
Example
Suppose a SQLAlchemy model in a Flask app like this:
from app import db #…
NE555
- 76
- 10
2
votes
1 answer
TypeError: _deserialize() got an unexpected keyword argument 'partial' in marshmallow
I'm trying image upload API i'm getting the following error
127.0.0.1 "POST //upload/image HTTP/1.1" 500 -
Traceback (most recent call last):
File "D:\c_code\projects\python_api\.venv\lib\site-packages\flask\app.py", line 2463, in __call__
…
Himavan
- 385
- 3
- 16
2
votes
1 answer
Deserialize list of ids for many-to-many PUT operation
I have a User and Role model with a many-to-many relationship
class User(BaseModel, TimestampableMixin):
username = Column(String(MEDIUM_STRING_LENGTH), nullable=False, unique=True)
roles = relationship('Role', secondary='user_roles',…
Casey
- 395
- 1
- 2
- 8
1
vote
1 answer
Marshmallow Date Validation
I have written a validation for the input that I receive but now the issue is that i have mentioned a type as date and whenever the date is empty I receive it as "". So is there any way that I can skip validation if input is ""?
My…
Mohammed Aquib
- 11
- 4
1
vote
1 answer
How to get marshmallow to give out a List of nested classes with 1 entry pulled out
I am trying to get flask-marshmallow to give me a list of translated entries from a Table called Type that is associated to a table called Language. I cannot figure out how to nest the responses in a list. I gave an example of my current output JSON…
rockets4all
- 684
- 3
- 8
- 32
1
vote
3 answers
Flask jsonify returns Response. How to provide status code?
I sow a lot of examples where developers have the following expression:
return jsonify(data), 200
Even in my last work project I had the same expression, but now, when I'm trying to write my new project, I catch the following error:
TypeError:…
Dzianis Talkachou
- 416
- 3
- 13
1
vote
0 answers
Python: marshmallow doesn't return backref column data
I have two tables as below where SupplierCompany has a relationship with Office and has a backref column referenced in the Office table:
class Office(BaseModel):
__tablename__ = 'offices'
id = db.Column(db.Integer, primary_key=True)
…
Omar Abdelrazik
- 683
- 2
- 9
- 30
1
vote
1 answer
Getting foreign key instead of relationship table in marshmallow_sqlalchemy schema
I have a flask-sqlalchemy table composed of a relationship with 4 other tables as follows:
office_cardgroups = db.Table('office_cardgroups',
db.Column('officedata_id', db.Integer, db.ForeignKey('officedata.id')),
…
Omar Abdelrazik
- 683
- 2
- 9
- 30
1
vote
0 answers
TypeError: execute_values() got an unexpected keyword argument 'fetch'
I am having an issue with creating an entry into a many-to-many postgresql db table with Flask, Flask-sqlalchemy, and flask-marshmallow. Below are my model setups.
role_permissions = db.Table(
'role_permissions',
db.Column('id', db.Integer,…
A. Josh
- 41
- 5
1
vote
0 answers
Flask sqlalchemy Marshmallow deserialize many to many 'dict' object has no attribute '_sa_instance_state'
I'm trying to user marshmallow's .load() method to deserialize a json object on a POST request. But I keep running into this error 'dict' object has no attribute '_sa_instance_state' Users and Roles has a many to many relationship. .dump() on the…
RuSs
- 769
- 2
- 12
- 27
1
vote
1 answer
marshmallow - include_fk fail if foreign_key is not int
On serializing a related database entity with sql-alchemy and marshmallow I encountered following issue:
On dumping this schema the debugger raises a ValueError with the message
self._serialize(d, many=False)
value =…
voltae
- 582
- 4
- 11
1
vote
1 answer
How to input array of strings with Flask + Swagger UI?
I have a flask api that automatically validates and generates Swagger documentation thanks to marshmallow package.
One of the API methods is a POST request that wants a specific id as a string and a list_of_ids as an array of strings. The GUI looks…
purple_lolakos
- 456
- 5
- 15