{"id":237756,"date":"2021-01-01T06:04:57","date_gmt":"2020-12-31T22:04:57","guid":{"rendered":"http:\/\/4563.org\/?p=237756"},"modified":"2021-01-01T06:04:57","modified_gmt":"2020-12-31T22:04:57","slug":"flask-%e6%ba%90%e7%a0%81%e7%b3%bb%e5%88%97%e6%96%87%e7%ab%a0","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=237756","title":{"rendered":"Flask \u6e90\u7801\u7cfb\u5217\u6587\u7ae0"},"content":{"rendered":"
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Flask \u6e90\u7801\u7cfb\u5217\u6587\u7ae0 <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : johnsona <\/span> <\/i> 0<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u5199\u4e86\u51e0\u7bc7\u5173\u4e8e Flask \u6e90\u7801\u7684\u6587\u7ae0<\/p>\n

Flask \u6e90\u7801\u7cfb\u5217<\/p>\n

\u4e5f\u53ef\u4ee5\u5173\u6ce8\u6211\u7684\u516c\u4f17\u53f7<\/p>\n

\"Flask<\/p>\n

\u6301\u7eed\u66f4\u65b0\u4e2d<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (11<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ErwinCheung <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5f88\u4e0d\u9519\u7684\u6837\u5b50 \u6700\u8fd1\u4e0d\u66f4\u65b0\u4e86\u5417 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : johnsona <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @ErwinCheung \u4f1a\u628a Flask \u6e90\u7801\u6301\u7eed\u66f4\u65b0\u5b8c <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : stdout <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    flask \u7684 pycharm \u7684\u81ea\u52a8\u63d0\u793a\u592a\u70c2\u4e86\u3002\u52a8\u6001\u7ed1\u5b9a\u7684\u53d8\u91cf\u548c\u65b9\u6cd5\u5bfc\u81f4\u8865\u5168\u592a\u5dee\u3002\u4e0d\u77e5\u9053\u540e\u671f\u662f\u5426\u4f1a\u6709\u6539\u5584\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : johnsona <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @stdout \u52a8\u6001\u7ed1\u5b9a\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u8fd9\u4e2a\u600e\u4e48\u611f\u89c9\u6362\u5176\u4ed6\u6846\u67b6\u4e5f\u4e0d\u597d\u89e3\u51b3\uff0cfastapi \u53ef\u4ee5\u5417 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : learningman <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @johnsona fastapi \u4e5f\u4e0d\u884c\uff0c\u8fd0\u884c\u65f6\u52a0\u8f7d\u7684\u4e1c\u897f\u60f3\u81ea\u52a8\u8865\u5168\u4f30\u8ba1\u8981\u4e0a AI \u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : shroxd <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u6b63\u597d\u60f3\u770b\u770b\u8fd9\u65b9\u9762\u5185\u5bb9\uff0c\u611f\u8c22 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : stdout <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @johnsona \u8fb9\u770b\u6587\u6863\u8fb9\u5199\uff0c\u6216\u8005\u81ea\u5df1\u62bd\u8c61\u4e00\u5c42\u3002\u6211\u6253\u5305\u7684 base \u53c2\u8003
    “` <\/p>\n

    class BaseModel(db.Model):
    __abstract__ = True<\/p>\n

    create_time = db.Column(db.DateTime, nullable=False, index=True, comment=’\u521b\u5efa\u65f6\u95f4’)
    update_time = db.Column(db.DateTime, nullable=False, index=True, comment=’\u4fee\u6539\u65f6\u95f4’)<\/p>\n

    # \u53e6\u5916\u4e00\u79cd\u65b9\u5f0f\u5904\u7406\u81ea\u52a8\u66f4\u65b0
    # created_at = db.Column(db.DateTime, default=sqlalchemy.func.now(), nullable=False)
    # updated_at = db.Column(db.DateTime, default=sqlalchemy.func.now(), onupdate=sqlalchemy.func.now(), nullable=False)<\/p>\n

    @classmethod
    def qry(cls) -> BaseQuery:
    return db.session.query(cls)<\/p>\n

    @classmethod
    def filter(cls, *args) -> Query:
    return cls.qry().filter(*args)<\/p>\n

    @classmethod
    def count(cls, rsql=None, sort=None, ignore_fields=None):
    _q = cls.qry().filter(to_db_query_sql(cls, rsql, ignore_fields))
    if sort is not None and sort != ”:
    _q = _q.order_by(to_db_order(cls, sort))
    return _q.count()<\/p>\n

    @classmethod
    def count_by(cls, **kwargs):
    return cls.qry().filter_by(**kwargs).count()<\/p>\n

    @classmethod
    def find(cls, rsql=None, sort=None, ignore_fields=None):
    _q = cls.qry().filter(to_db_query_sql(cls, rsql, ignore_fields))
    if sort is not None and sort != ”:
    _q = _q.order_by(to_db_order(cls, sort))
    return _q.all()<\/p>\n

    @classmethod
    def page_find(cls, page_num, page_size, rsql=None, sort=None, and_sql=None, ignore_fields=None):
    if rsql is None or rsql.strip() == ”:
    rsql = and_sql
    elif and_sql is not None:
    rsql = “(%s) and (%s)” % (rsql, and_sql)
    _q = cls.qry().filter(to_db_query_sql(cls, rsql, ignore_fields))
    if sort is not None and sort != ”:
    _q = _q.order_by(to_db_order(cls, sort))
    ret = _q.paginate(page_num, page_size)
    return ret<\/p>\n

    @classmethod
    def get(cls, _id):
    # print(cls)
    # print(__class__)
    # print(__class__.__dict__)
    # print(__class__.__bases__)
    # print(__class__.__subclasses__())
    return cls.qry().get(_id)<\/p>\n

    @classmethod
    def delete(cls, _id):
    cls.qry().filter(cls.id == _id).delete()
    db.session.commit()<\/p>\n

    def save(self):
    try:
    db.session.add(self)
    db.session.flush()
    db.session.commit()
    except BaseException as e:
    _log.error(e)
    db.session.rollback()<\/p>\n

    @classmethod
    def add(cls, obj, save=True):
    item = None
    _type = type(obj)
    if _type is dict:
    item = cls.from_dict(obj)
    elif _type is cls:
    item = obj
    if item is not None:
    if hasattr(item, ‘check’) and callable(getattr(item, ‘check’)):
    getattr(item, ‘check’)()
    if save:
    item.save()
    return item<\/p>\n

    def update_from_dict(self, obj, valid_fields=None):
    columns = [m.key for m in self.__table__.columns]
    valid_keys = [k for k in obj.keys() if k in columns]
    item = self.from_dict(obj)
    for k in valid_keys:
    if valid_fields is not None and k not in valid_fields:
    continue
    setattr(self, k, getattr(item, k))<\/p>\n

    @classmethod
    def update(cls, obj, save=True, valid_fields=None):
    item = None
    _type = type(obj)
    if _type is dict:
    pk = inspect(cls).primary_key[0].name
    if pk not in obj.keys():
    return None
    item = cls.get(obj[pk])
    item.update_from_dict(obj, valid_fields)
    elif _type is cls:
    item = obj
    if item is not None:
    if hasattr(item, ‘check’) and callable(getattr(item, ‘check’)):
    getattr(item, ‘check’)()
    if save:
    item.save()
    return item<\/p>\n

    @classmethod
    def find_one_by(cls, **kwargs):
    return cls.qry().filter_by(**kwargs).one_or_none()<\/p>\n

    @classmethod
    def find_first_by(cls, **kwargs):
    return cls.qry().filter_by(**kwargs).first()<\/p>\n

    @classmethod
    def find_all_by(cls, **kwargs) -> list:
    return cls.qry().filter_by(**kwargs).all()<\/p>\n

    @classmethod
    def from_dict(cls, obj):
    if type(obj) not in [dict, RowProxy]:
    return None
    _obj = {}
    columns = inspect(cls).columns
    for column in columns:
    if column.name not in obj.keys():
    continue
    obj_value = obj[column.name]
    _type = type(column.type)
    value = obj_value
    if value is None:
    pass
    elif _type is Date:
    value = to_local_datetime(obj_value).date()
    elif _type is DateTime:
    value = to_local_datetime(obj_value)
    elif _type is Boolean:
    if type(value) is str:
    value = value.lower() == ‘true’
    else:
    value = bool(obj_value)
    elif _type is Integer:
    if type(obj_value) is int:
    value = obj_value
    elif type(obj_value) is str:
    if not obj_value.isdigit():
    value = None
    else:
    value = int(obj_value)
    elif _type is Float:
    value = float(obj_value)
    elif _type is int:
    value = int(obj_value)
    elif _type:
    value = str(obj_value)
    _obj[column.name] = value
    # columns = [m.key for m in cls.__table__.columns]
    # _obj = {k: v for k, v in obj.items() if k in columns}
    return cls(**_obj)<\/p>\n

    def to_dict(self, rel=True, ignore=None):
    “””Returns the model properties as a dict<\/p>\n

    :rtype: dict
    “””
    result = {}<\/p>\n

    if ignore is None:
    ignore = []<\/p>\n

    columns = set([attr for attr in dir(self) if not attr.startswith(‘_’)
    and attr not in ignore
    and attr not in [‘metadata’, ‘query’, ‘query_class’]
    and not callable(getattr(self, attr))
    ])
    if not rel:
    columns = [m.key for m in self.__table__.columns]
    for attr in columns:
    value = getattr(self, attr)
    if isinstance(value, list):
    result[attr] = list(map(lambda x: x.to_dict() if hasattr(x, “to_dict”) else x, value))
    elif hasattr(value, “to_dict”):
    result[attr] = value.to_dict()
    elif isinstance(value, dict):
    result[attr] = dict(map(
    lambda item: (item[0], item[1].to_dict())
    if hasattr(item[1], “to_dict”) else item,
    value.items()
    ))
    else:
    result[attr] = value
    return result<\/p>\n

    def to_json(self):
    def extended_encoder(x):
    if isinstance(x, datetime.datetime):
    return x.strftime(“%Y-%m-%d %H:%M:%S”)
    if isinstance(x, datetime.date):
    return x.strftime(“%Y-%m-%d”)
    if isinstance(x, UUID):
    return str(x)<\/p>\n

    json_ignore = []
    if hasattr(self, ‘_json_ignore’):
    json_ignore = self._json_ignore
    return json.dumps(self.to_dict(ignore=json_ignore), default=extended_encoder)<\/p>\n

    @staticmethod
    def result_to_dict(result, keys):
    new_result = []
    for row in result:
    row = dict(zip([attr.name for attr in keys], row))
    new_result.append(row)
    return new_result
    “` <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : johnsona <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @stdout \u633a\u597d\u7684\uff0csqlalchemy \u8fd8\u662f\u8981\u624b\u52a8\u5c01\u88c5\u4e00\u4e9b\u4e1c\u897f\u7684
    \u6211\u4e4b\u524d\u8fd8\u8bd5\u8fc7 Marshallmallow \u6765\u628a model \u8f6c\u5316\u4e3a dict \u4ee5\u53ca\u53cd\u5e8f\u5217\u5316\u548c\u6821\u9a8c\u5165\u53c2\uff0c\u66f4\u52a0\u63a5\u8fd1 drf \u4e00\u70b9\uff0c\u4f46\u662f\u522b\u4eba\u53ef\u80fd\u5c31\u8981\u82b1\u591a\u4e00\u4e9b\u65f6\u95f4\u770b Marshallmallow \u7684\u6587\u6863
    \u6240\u4ee5\u6211\u89c9\u5f97\u5176\u5b9e\u8fd9\u6837\u5199\u5c31\u633a\u597d\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : johnsona <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @shroxd \u4e0d\u5ba2\u6c14~ <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ErwinCheung <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    laoge \u4f60\u8fd9\u4e2a\u4ee3\u7801\u7684\u7f29\u8fdb \u5904\u5973\u5ea7\u65e0\u6cd5\u5fcd\u53d7 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : SjwNo1 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u90a3\u4e48\uff0c\u8c01\u5199\u8fc7\u5206\u6790 django \u6e90\u7801\u7684\u6587\u7ae0 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

    Flask \u6e90\u7801\u7cfb\u5217\u6587\u7ae0 \u8cc7\u6df1\u5927\u4f6c…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/237756"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=237756"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/237756\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=237756"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=237756"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=237756"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}