Questions tagged [flask-marshmallow]
106 questions
30
votes
6 answers
Update row (SQLAlchemy) with data from marshmallow
I'm using Flask, Flask-SQLAlchemy, Flask-Marshmallow + marshmallow-sqlalchemy, trying to implement REST api PUT method. I haven't found any tutorial using SQLA and Marshmallow implementing update.
Here is the code:
class NodeSchema(ma.Schema):
#…
gcerar
- 920
- 1
- 13
- 24
8
votes
3 answers
Flask-Marshmallow AttributeError: List Object has no Attribute 'data'
I have a local SQLlite DB which I have connected through the code below:
'''
from flask import Flask, jsonify, request
from flask_sqlalchemy import SQLAlchemy
from sqlalchemy import Column, Integer, String, Float
import os
from flask_marshmallow…
Rupesh Desai
- 171
- 2
- 5
8
votes
3 answers
How to handle file upload validations using Flask-Marshmallow?
I'm working with Flask-Marshmallow for validating request and response schemas in Flask app. I was able to do simple validations for request.form and request.args when there are simple fields like Int, Str, Float etc.
I have a case where I need to…
Underoos
- 4,708
- 8
- 42
- 85
4
votes
0 answers
Serialization with relationships very slow with Marshmallow
I have the following example table in my DB which I manage mit Flask_SQLAlchemy.
class Employee(db.Model):
__tablename__ = 'employee'
id = db.Column(db.Integer, primary_key=True)
salutation = db.Column(db.String(250), nullable=False)
…
MGmuer
- 51
- 4
4
votes
2 answers
sqlalchemy.orm.exc.UnmappedInstanceError: Class 'builtins.dict' is not mapped
I'm trying to insert a new User into a DB using SQLAlchemy and Marshmallow. The user parameter is received from an API endpoint. Everything works until I get to this line in the create function:
db.session.add(new_user)
The value of the new_user…
Aeross
- 302
- 2
- 3
- 12
4
votes
2 answers
Flask-marshmallow dump of flask-sqlalchemy outer join returns empty
I have two tables, PackMatData and ColorData:
class PackMatData(db.Model):
id = db.Column(db.Integer, primary_key=True)
unique_name = db.Column(db.String(20), index=True, unique=True)
se_name = db.Column(db.String(20), index=True)
…
AureliusEpictetus
- 41
- 2
3
votes
2 answers
SQLALchemy .query: Unresolved attribute reference 'query' for class 'Car'
I have an issue that was already mentioned here
https://youtrack.jetbrains.com/issue/PY-44557
But I couldn't find a solution yet. I'm using Python Flask with SQLAlchemy to create an API service.
Here are my imports:
from flask import Flask, jsonify,…
Fuad Fouad
- 448
- 3
- 9
3
votes
4 answers
Marshmallow custom validation message for email
I use the following schema to validate data:
class UserSchema(db_schema.Schema):
email = data_fields.Email(required = True,
error_messages={
'required': 'Email is mandatory field.',
'type': 'The manager email is not…
mimic
- 4,897
- 7
- 54
- 93
3
votes
0 answers
How to update nested objects in Flask-SQLAlchemy-Marshmallow
Could you help me to update nested objects in Flask-SQLAlchemy-Marshmallow. Here is the model
Parent Model
class ParentModel(db.Model):
__tablename__ = "parent"
id = db.Column(db.Integer, primary_key=True)
parent_name =…
Himavan
- 385
- 3
- 16
3
votes
1 answer
How to validate a list of elements of specific type in marshmallow?
I have a POST endpoint in flask which takes a json data which contains a key - collections which has a list as value which in turn contains list of dictionaries containing specific keys in it.
I'm trying to validate the request.json but couldn't…
Underoos
- 4,708
- 8
- 42
- 85
3
votes
1 answer
flask-marshmallow serialize datetime to unix timestamp?
Default, DateTime fields will be serialized to a format like 2020-02-02T13:25:33, but I want to serialized it to unix timestamp. I've read flask-marshmallow documents and marshmallow documents, I only find ways to custom the output datetime format.…
einverne
- 6,454
- 6
- 45
- 91
2
votes
1 answer
Nesting in Python and Marshmallow with a field that does not exist in the database
I have these schemas in Marshmallow:
class Parents(Schema):
father = fields.String(data_key="father")
mother = fields.String(data_key="mother")
class UserSchema(Schema):
user_id = fields.Integer(data_key="userID")
name =…
Eduardo Daltro
- 81
- 9
2
votes
1 answer
Marshmallow dumps missing 1 required positional argument: 'obj'
For some reason this code produces the error below and i cannot figure out why. In the guide I followed dump was called the same way as far as I can tell and googling has been fruitless especially since this appears to be an error message…
Gabriel
- 23
- 1
- 4
2
votes
0 answers
Prevent marshmallow from querying the db
I want to completely prevent marshmallow from querying the db.
Below the explanatory code snippet
from flask_sqlalchemy import SQLAlchemy
from marshmallow_sqlalchemy import SQLAlchemyAutoSchema
from flask_restful import Resource
db =…
Rukamakama
- 780
- 1
- 8
- 16
2
votes
2 answers
Marshmallow returning empty JSON after dumping
I am trying to implement a restful API with Flask using flask-restful, flask-sqlalchemy and flask-marshmallow. I am aware there are many questions about this issue but I still can't figure it out.
Solutions like using strict=True in marshmallow…
Audrey Igouassel
- 21
- 3