-
Notifications
You must be signed in to change notification settings - Fork 13
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Merge pull request #2 from ambitioninc/develop
0.1
- Loading branch information
Showing
16 changed files
with
914 additions
and
14 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,16 @@ | ||
# Compiled python files | ||
*.pyc | ||
|
||
# Vim files | ||
*.swp | ||
*.swo | ||
|
||
# Coverage files | ||
.coverage | ||
|
||
# Setuptools distribution folder. | ||
/dist/ | ||
|
||
# Python egg metadata, regenerated from source files by setuptools. | ||
/*.egg-info | ||
/*.egg |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,15 @@ | ||
language: python | ||
python: | ||
- '2.7' | ||
env: | ||
- DJANGO=1.6.1 DB=postgres | ||
install: | ||
- pip install -q Django==$DJANGO | ||
- pip install -r requirements.txt | ||
before_script: | ||
- find . | grep .py$ | grep -v /migrations | xargs pep8 --max-line-length=120 | ||
- find . | grep .py$ | grep -v /migrations | grep -v __init__.py | xargs pyflakes | ||
- psql -c 'CREATE DATABASE manager_utils;' -U postgres | ||
script: | ||
- coverage run --source='manager_utils' --branch manage.py test | ||
- coverage report --fail-under=100 |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,3 @@ | ||
include manager_utils/VERSION | ||
include README.md | ||
include LICENSE |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -1,4 +1,134 @@ | ||
[![Build Status](https://travis-ci.org/ambitioninc/django-manager-utils.png)](https://travis-ci.org/ambitioninc/django-manager-utils) | ||
django-manager-utils | ||
==================== | ||
===================== | ||
|
||
Model manager utils for Django | ||
Additional utilities for Django model managers. | ||
|
||
## A Brief Overview | ||
Django manager utils allows a user to perform various functions not natively supported by Django's model managers. To use the manager in your Django models, do: | ||
|
||
from manager_utils import ManagerUtilsManager | ||
|
||
class MyModel(Model): | ||
objects = ManagerUtilsManager() | ||
|
||
If you want to extend an existing manager to use the manager utils, include mixin provided first (since it overrides the get_queryset function) as follows: | ||
|
||
from manager_utils import ManagerUtilsMixin | ||
|
||
class MyManager(ManagerUtilsMixin, Manager): | ||
pass | ||
|
||
An overview of each util is below with links to more in-depth documentation and examples for each function. | ||
|
||
- [single](#single): Grabs a single element from table and verifies it is the only element. | ||
- [get_or_none](#get_or_none): Performs a get on a queryset and returns None if the object does not exist. | ||
- [upsert](#upsert): Performs an upsert (update or insert) to a model. | ||
- [bulk_update](#bulk_update): Bulk updates a list of models and the fields that have been updated. | ||
|
||
|
||
## single()<a name="single"></a> | ||
Assumes that the model only has one element in the table or queryset and returns that value. If the table has more than one or no value, an exception is raised. | ||
|
||
**Returns**: The only model object in the queryset. | ||
|
||
**Raises**: DoesNotExist error when the object does not exist or a MultipleObjectsReturned error when there is more than one object. | ||
|
||
**Examples**: | ||
|
||
TestModel.objects.create(int_field=1) | ||
model_obj = TestModel.objects.single() | ||
print model_obj.int_field | ||
1 | ||
|
||
## get_or_none(\*\*query_params)<a name="get_or_none"></a> | ||
Get an object or return None if it doesn't exist. | ||
|
||
**Args**: | ||
- \*\*query_params: The query parameters used in the lookup. | ||
|
||
**Returns**: A model object if one exists with the query params, None otherwise. | ||
|
||
**Examples**: | ||
|
||
model_obj = TestModel.objects.get_or_none(int_field=1) | ||
print model_obj | ||
None | ||
|
||
TestModel.objects.create(int_field=1) | ||
model_obj = TestModel.objects.get_or_none(int_field=1) | ||
print model_obj.int_field | ||
1 | ||
|
||
## upsert(defaults=None, updates=None, \*\*kwargs)<a name="upsert"></a> | ||
Performs an update on an object or an insert if the object does not exist. | ||
|
||
**Args**: | ||
- defaults: These values are set when the object is inserted, but are irrelevant when the object already exists. This field should only be used when values only need to be set during creation. | ||
- updates: These values are updated when the object is updated. They also override any values provided in the defaults when inserting the object. | ||
- \*\*kwargs: These values provide the arguments used when checking for the existence of the object. They are used in a similar manner to Django's get_or_create function and are set in a created object. | ||
|
||
**Returns**: A tuple of the upserted object and a Boolean that is True if it was created (False otherwise) | ||
|
||
**Examples**: | ||
|
||
# Upsert a test model with an int value of 1. Use default values that will be given to it when created | ||
model_obj, created = TestModel.objects.upsert(int_field=1, defaults={'float_field': 2.0}) | ||
print created | ||
True | ||
print model_obj.int_field, model_obj.float_field | ||
1, 2.0 | ||
|
||
# Do an upsert on that same model with different default fields. Since it already exists, the defaults | ||
# are not used | ||
model_obj, created = TestModel.objects.upsert(int_field=1, defaults={'float_field': 3.0}) | ||
print created | ||
False | ||
print model_obj.int_field, model_obj.float_field | ||
1, 2.0 | ||
|
||
# In order to update the float field in an existing object, use the updates dictionary | ||
model_obj, created = TestModel.objects.upsert(int_field=1, updates={'float_field': 3.0}) | ||
print created | ||
False | ||
print model_obj.int_field, model_obj.float_field | ||
1, 3.0 | ||
|
||
# You can use updates on a newly created object that will also be used as initial values. | ||
model_obj, created = TestModel.objects.upsert(int_field=2, updates={'float_field': 4.0}) | ||
print created | ||
True | ||
print model_obj.int_field, model_obj.float_field | ||
2, 4.0 | ||
|
||
## bulk_update(model_objs, fields_to_update)<a name="bulk_update"></a> | ||
Performs an bulk update on an list of objects. Any fields listed in the fields_to_update array will be updated in the database. | ||
|
||
**Args**: | ||
- model_objs: A list of model objects that are already stored in the database. | ||
- fields_to_update: A list of fields to update in the models. Only these fields will be updated in the database. The 'id' field is included by default. | ||
|
||
**Examples**: | ||
|
||
# Create a couple test models | ||
model_obj1 = TestModel.objects.create(int_field=1, float_field=2.0, char_field='Hi') | ||
model_obj2 = TestModel.objects.create(int_field=3, float_field=4.0, char_field='Hello') | ||
|
||
# Change their fields and do a bulk update | ||
model_obj1.int_field = 10 | ||
model_obj1.float_field = 20.0 | ||
model_obj2.int_field = 30 | ||
model_obj2.float_field = 40.0 | ||
TestModel.objects.bulk_update([model_obj1, model_obj2], ['int_field', 'float_field']) | ||
|
||
# Reload the models and view their changes | ||
model_obj1 = TestModel.objects.get(id=model_obj1.id) | ||
print model_obj1.int_field, model_obj1.float_field | ||
10, 20.0 | ||
|
||
model_obj2 = TestModel.objects.get(id=model_obj2.id) | ||
print model_obj2.int_field, model_obj2.float_field | ||
10, 20.0 | ||
|
||
## License | ||
MIT License (See the LICENSE file included in this repository) |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,10 @@ | ||
#!/usr/bin/env python | ||
import os | ||
import sys | ||
|
||
if __name__ == '__main__': | ||
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'test_project.settings') | ||
|
||
from django.core.management import execute_from_command_line | ||
|
||
execute_from_command_line(sys.argv) |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1 @@ | ||
0.1 |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1 @@ | ||
from .manager_utils import ManagerUtilsMixin, ManagerUtilsManager |
Oops, something went wrong.