mirror of
https://github.com/ets-labs/python-dependency-injector.git
synced 2025-02-07 07:00:49 +03:00
Add new one concept example that uses full syntax
This commit is contained in:
parent
12c4463901
commit
7b35909083
67
examples/concept_full_syntax.py
Normal file
67
examples/concept_full_syntax.py
Normal file
|
@ -0,0 +1,67 @@
|
|||
"""Concept example of `Dependency Injector`."""
|
||||
|
||||
import sqlite3
|
||||
|
||||
from dependency_injector import catalogs
|
||||
from dependency_injector import providers
|
||||
from dependency_injector import injections
|
||||
|
||||
|
||||
class UsersService(object):
|
||||
"""Users service, that has dependency on database."""
|
||||
|
||||
def __init__(self, db):
|
||||
"""Initializer."""
|
||||
self.db = db
|
||||
|
||||
|
||||
class AuthService(object):
|
||||
"""Auth service, that has dependencies on users service and database."""
|
||||
|
||||
def __init__(self, db, users_service):
|
||||
"""Initializer."""
|
||||
self.db = db
|
||||
self.users_service = users_service
|
||||
|
||||
|
||||
class Services(catalogs.DeclarativeCatalog):
|
||||
"""Catalog of service providers."""
|
||||
|
||||
database = providers.Singleton(sqlite3.connect,
|
||||
injections.Arg(':memory:'))
|
||||
""":type: providers.Provider -> sqlite3.Connection"""
|
||||
|
||||
users = providers.Factory(UsersService,
|
||||
injections.KwArg('db', database))
|
||||
""":type: providers.Provider -> UsersService"""
|
||||
|
||||
auth = providers.Factory(AuthService,
|
||||
injections.KwArg('db', database),
|
||||
injections.KwArg('users_service', users))
|
||||
""":type: providers.Provider -> AuthService"""
|
||||
|
||||
|
||||
# Retrieving catalog providers:
|
||||
users_service = Services.users()
|
||||
auth_service = Services.auth()
|
||||
|
||||
# Making some asserts:
|
||||
assert users_service.db is auth_service.db is Services.database()
|
||||
assert isinstance(auth_service.users_service, UsersService)
|
||||
assert users_service is not Services.users()
|
||||
assert auth_service is not Services.auth()
|
||||
|
||||
|
||||
# Making some "inline" injections:
|
||||
@injections.inject(users_service=Services.users)
|
||||
@injections.inject(auth_service=Services.auth)
|
||||
@injections.inject(database=Services.database)
|
||||
def example(users_service, auth_service, database):
|
||||
"""Example callback."""
|
||||
assert users_service.db is auth_service.db
|
||||
assert auth_service.db is database
|
||||
assert database is Services.database()
|
||||
|
||||
|
||||
# Making a call of decorated callback:
|
||||
example()
|
Loading…
Reference in New Issue
Block a user