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ログインユーザ情報をユースケースクラスとビジネスロジッククラスで引き回す
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| #!/usr/bin/env python | |
| # coding: utf-8 | |
| ## | |
| ## ビジネスロジック | |
| ## | |
| class BusinessLogic: # 「Service」や「Operation」でもよい | |
| def __init__(self, login_user=None): | |
| self.login_user = login_user | |
| class BugReportBL(BusinessLogic): | |
| def バグレポートを作成(self, title, text): | |
| sql = "insert into bug_reports (title, text, reporter_id) values (?, ?, ?)" | |
| reporter = self.login_user | |
| args = [title, text, reporter.id] | |
| DB.execute(sql, args) | |
| Logging.debug(f"login_user={self.login_user.name}") #← ログ出力!!! | |
| bugreport = BugReport(title, text, reporter) | |
| return bugreport | |
| def バグレポートをクローズ(self, ...): | |
| ... | |
| def バグレポートに担当者をアサイン(self, ...): | |
| ... | |
| ## | |
| ## ユースケース | |
| ## | |
| class UseCase: # 「API」でもよい | |
| def __init__(self, login_user=None): | |
| self.login_user = login_user | |
| def perform(self, params, *args, **kwargs): | |
| errors = self.validate(params) # バリデーション | |
| if errors: | |
| return handle_validation_error(errors) | |
| context = self.execute(**args, **kwargts) # ビジネスロジックを呼び出す | |
| resp_body = self.represent(context) # JSONやHTMLを生成 | |
| return resp_body | |
| def validate(params): | |
| raise NotImplementedError | |
| def execute(*args, **kwargs): | |
| raise NotImplementedError | |
| def represent(context): | |
| raise NotImplementedError | |
| def handle_validation_error(self, errors): | |
| raise ValidationError(errors) | |
| class CreateBugReportUC(UseCase): | |
| def validate(self, params): # バリデーション | |
| errors = {} | |
| if not params.get('title'): | |
| errors['title'] = "Required." | |
| if not params.get('text'): | |
| errors['text'] = "Required." | |
| return errors | |
| def perform(self, title, text): # ビジネスロジックを呼び出す | |
| bl = BugReportBL(self.login_user) | |
| bugreport = bl.バグレポートを作成(title, text) | |
| Logging.debug(f"login_user={self.login_user.name}") #← ログ出力!!! | |
| return {'bugreport': bugreport} | |
| def represent(self, context): # JSONやHTMLを生成する | |
| x = context['bugreport'] | |
| json_data = { | |
| "bugreport": { | |
| "id": x.id, | |
| "title": x.title, | |
| "text": x.text, | |
| "reporter": { | |
| "id": x.reporter.id, | |
| "name": x.reporter.name, | |
| }, | |
| }, | |
| } | |
| return JSON.encode(json_data) | |
| ## | |
| ## コントローラ | |
| ## | |
| class BugReportController(Framework.Controller): | |
| def on_get(self): | |
| ... | |
| def on_post(self): | |
| uc = CreateBugReportUC(self.get_login_user()) # ユースケース作成時にログインユーザを渡す | |
| params = self.request.params | |
| args = [params.get('title'), params.get('text')] | |
| resp_body = uc.perform(params, *args) # ユースケースを実行 | |
| return resp_body |
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