https://github.com/weynelucas/django-db-adapter
A flexible toolkit for customize how Django creates the database objects for the application schema
https://github.com/weynelucas/django-db-adapter
application-schema database django oracle python sql-statements
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A flexible toolkit for customize how Django creates the database objects for the application schema
- Host: GitHub
- URL: https://github.com/weynelucas/django-db-adapter
- Owner: weynelucas
- License: mit
- Created: 2018-04-12T16:18:33.000Z (almost 8 years ago)
- Default Branch: master
- Last Pushed: 2024-03-20T15:49:59.000Z (almost 2 years ago)
- Last Synced: 2024-08-10T00:11:19.039Z (over 1 year ago)
- Topics: application-schema, database, django, oracle, python, sql-statements
- Language: Python
- Homepage:
- Size: 83 KB
- Stars: 7
- Watchers: 2
- Forks: 1
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# Django DB adapter
[](https://github.com/weynelucas/django-db-adapter/actions/workflows/test.yml)
[](https://github.com/weynelucas/django-db-adapter/actions/workflows/deploy.yml)
[](https://codecov.io/gh/weynelucas/django-db-adapter)
[](https://pypi.python.org/pypi/django-db-adapter)
[](https://pypi.python.org/pypi/django-db-adapter)
[](https://pypi.python.org/pypi/django-db-adapter)
[](https://pepy.tech/project/django-db-adapter)
[](https://github.com/psf/black)
A flexible toolkit for customize how Django creates the databse objects for the
application schema
# Overview
Django DB adapter is a flexible schema editor backend built to solve the following problems:
- Generate SQL statements for projects working on database-first approach
- All objects created (including created from Django) must have a particular name pattern, like add prefixes and suffixes
- All table columns should be commented
- Inline constraints (primary/foreign keys, unique/check constraints and indexes) are not allowed
- The database user of application is not the owner of the objects and has no privilege to create/alter/drop them (`python manage.py migrate` will not work for this user). All DDL statements generated should include a grant of manipulation privileges (select/insert/update/delete) on created objects for this user/role
- The order of SQL statements matters
# Requirements
- Python (3.6, 3.7, 3.8, 3.9)
- Django (1.11, 2.2)
We highly recommend and only officially support the latest patch release of each Python and Django series.
# Installation
Install using `pip`...
```bash
pip install django-db-adapter
```
Add `'db_adapter'` to your `INSTALLED_APPS` setting.
```python
INSTALLED_APPS = [
...
'db_adapter',
]
```
# Quick Example
Let's take a look at a quick example of using DB adapter to customize the DDL
statements generated by Django.
This example model defines a `Person`, which has a `first_name` and `last_name`:
```python
from django.db import models
class Person(models.Model):
first_name = models.CharField(max_length=30)
last_name = models.CharField(max_length=30, help_text="It's your last name")
class Meta:
db_table = 'person'
```
Add the following to your `settings.py` module:
```python
INSTALLED_APPS = [
... # Make sure to include the default installed apps here.
'db_adapter',
]
DATABASES = {
'default': {
# Make sure to include `db_adapter.db.backends.oracle` as database
# engine for schema customization
'ENGINE': 'db_adapter.db.backends.oracle',
'NAME': 'xe',
'USER': 'a_user',
'PASSWORD': 'a_password',
'HOST': 'dbprod01ned.mycompany.com',
'PORT': '1540',
}
}
DB_ADAPTER = {
'DEFAULT_ROLE_NAME': 'rl_example',
# Apply this pattern for all tables
'DEFAULT_DB_TABLE_PATTERN': '"example"."tb_{table_name}"',
# Ignore some patterns from normalization
'IGNORE_DB_TABLE_PATTERNS': [
'"{}"."{}"', # Tables with already declared namespace
'django_migrations', # Django migrations table
],
'DEFAULT_OBJECT_NAME_PATTERNS': {
'SEQUENCE': 'sq_{table_name}',
'TRIGGER': 'tg_{table_name}_b',
'INDEX': 'ix_{name}',
'PRIMARY_KEY': 'cp_{name}',
'FOREIGN_KEY': 'ce_{name}',
'UNIQUE': 'ct_{name}_uq',
'CHECK': 'ct_{name}{qualifier}',
},
'SQL_FORMAT_OPTIONS': {
'unquote': True,
'identifier_case': 'lower',
'keyword_case': 'lower',
},
# Order of SQL statements
'SQL_STATEMENTS_ORDER': [
'PRIMARY_KEY',
'UNIQUE',
'FOREIGN_KEY',
'CHECK',
'INDEX',
'COMMENT',
'CONTROL', # Grant/revoke table privileges for specified role (if exists)
'AUTOINCREMENT', # Sequence and triggers for auto-incremented fields
]
}
```
The above `Person` model would create a database table like this:
```sql
create table example.tb_person (
id number(11),
first_name nvarchar2(30),
last_name nvarchar2(30)
);
/
alter table example.tb_person
add constraint cp_person_id
primary key (id);
/
alter table example.tb_person
add constraint ct_person_id_nn
check (id is not null);
/
alter table example.tb_person
add constraint ct_person_first_name_nn
check (first_name is not null);
/
alter table example.tb_person
add constraint ct_person_last_name_nn
check (last_name is not null);
/
comment on column example.tb_person.last_name
is 'It''s your last name';
/
grant select, insert, update, delete
on example.tb_person
to rl_example;
/
create sequence example.sq_person
minvalue 1
maxvalue 99999999999
start with 1
increment by 1
cache 20;
/
grant select
on example.sq_person
to rl_example;
/
create or replace trigger example.tg_person_b
before insert on example.tb_person
for each row
when (new.id is null)
begin
select example.sq_person.nextval
into :new.id from dual;
end;
/
```
# Release notes
- `v1.0.0` - Apr 16, 2018 - First release
- `v1.0.1` - Apr 16, 2018 - Rename package and fix setup issues
- `v1.0.2` - Apr 17, 2018 - Fix documentation preview
- `v2.0.0` - Mar 1, 2021 - Recreate the entire schema editor backend with more flexible features
- `v2.0.1` - Mar 22, 2021 - Escape single quotes on column comments