- プロジェクトの作成 ~ デプロイ
Getting Started with Flask on App Engine Standard Environment - NDB Key Class : Context, Future, Key, Model, Query, PolyModel, Metadata, Function, Exceptions
- Entity Property Reference : BlobKeyProperty, BlobProperty, BooleanProperty, ComputedProperty, DateProperty, DateTimeProperty, FloatProperty, GenericProperty, GeoPtProperty, IntegerProperty, JsonProperty, KeyProperty, LocalStructuredProperty, PickleProperty, StringProperty, StructuredProperty, TextProperty, TimeProperty, UserProperty
- Template Designer Documentation ; Jinja2 Documentation (2.10)
# coding: utf-8
# https://issuetracker.google.com/issues/72043776#comment7
import os
import sys
on_appengine = os.environ.get('SERVER_SOFTWARE','').startswith('Development')
if on_appengine and os.name == 'nt':
sys.platform = "Not Windows"
from google.appengine.ext import vendor
# Add any libraries installed in the "lib" folder.
vendor.add('lib')
エラー発生時に、コンソール画面へスタックトレースを表示したい
# https://stackoverflow.com/a/46914462
app = Flask(__name__)
import os
production_environment = os.getenv('SERVER_SOFTWARE').startswith('Google App Engine/')
if not production_environment:
app.debug = True
空のレスポンス # https://stackoverflow.com/a/24295616
return ('', 201)
Key のパースエラーを包み隠す try:
key = ndb.Key(urlsafe = request.args.get('k'))
except Exception, e:
# https://github.com/googlecloudplatform/datastore-ndb-python/issues/143#issuecomment-110869342
if e.__class__.__name__ == 'ProtocolBufferDecodeError':
return ('', 404)
raise
Content-Type を設定 resp = Response("\n".join(lines))
resp.headers["content-type"] = 'text/plain'
return resp
Jinja2 で三項演算子。loop.first ? 'true' : 'false' 。参考{{ 'true' if loop.first else 'false' }}
?? 演算子も。{{ value or 'fallback' }}
JSON を返す。参考
from flask import jsonify return jsonify(root)自分の URL 参考
from flask import request request.base_url
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