如何使用eve-sqlalchemy

Question

我创建了一个简单的eve-sqlalchemy应用，其中包含User和Role资源，以模仿an example on their webpage。 User类可以有多个角色。完整的示例代码如下所示。

我有兴趣能够POST有角色的用户，或PATCH用户的角色。我没有能够找到一种方法来做到这一点，而不会遇到错误。

似乎eve-sqlalchemy强制User.roles的类型为整数，即Role类的主键id。如果我改为设置POST或PATCH请求以使roles字段为整数，eve-sqlalchemy会抱怨userroles关联表没有存在于self.driver.app.config['SOURCES']中。虽然我可以进行这些更改（即使userroles表成为声明性ORM并将其注册到装饰器）但我不确定这是否是正确的方法。

总之，eve-sqlalchemy如何POST User roles PATCH列表from eve import Eve from eve.utils import config from sqlalchemy import create_engine, Table, Column, String, Integer, ForeignKey, func, DateTime from sqlalchemy.ext.declarative import declarative_base from sqlalchemy.orm import relationship, sessionmaker from eve_sqlalchemy.decorators import registerSchema from eve_sqlalchemy import SQL from eve_sqlalchemy.validation import ValidatorSQL ID_FIELD = 'id' SQLALCHEMY_DATABASE_URI = 'sqlite:////tmp/eve-sqla-test.db' config.ID_FIELD = ID_FIELD config.ITEM_LOOKUP_FIELD = ID_FIELD Base = declarative_base() userroles_table = Table('userroles', Base.metadata, Column('user_id', Integer, ForeignKey("users.id"), primary_key=True), Column('role_id', Integer, ForeignKey("roles.id"), primary_key=True) ) class CommonColumns(Base): __abstract__ = True _created = Column(DateTime, default=func.now()) _updated = Column(DateTime, default=func.now(), onupdate=func.now()) _etag = Column(String(40)) class Role(CommonColumns): __tablename__ = 'roles' id = Column(Integer, primary_key=True, autoincrement=True) role = Column(String, unique=True, nullable=False) class User(CommonColumns): __tablename__ = 'users' id = Column(Integer, primary_key=True, autoincrement=True) login = Column(String, unique=True, nullable=False) roles = relationship("Role", backref="users", secondary=userroles_table) def create_entries(): '''Creates test entries for querying with eve''' engine = create_engine(SQLALCHEMY_DATABASE_URI) Base.metadata.bind = engine Base.metadata.create_all() SessionMaker = sessionmaker(bind=engine) s = SessionMaker() u1 = User(login='user1') u1.roles.append(Role(role='admin')) u2 = User(login='user2') u2.roles.append(Role(role='user')) s.add_all((u1, u2)) s.commit() def run(): '''Runs the eve server''' for table in (User, Role): registerSchema(table.__tablename__)(table) users = User._eve_schema[User.__tablename__] users.update({ 'item_methods': ['GET', 'PATCH', 'DELETE'], 'resource_methods': ['GET', 'POST'], }) roles = Role._eve_schema[Role.__tablename__] roles.update({ 'resource_methods': ['GET', 'POST'], }) DOMAIN = { 'users': users, 'roles': roles, } SETTINGS = { 'SQLALCHEMY_DATABASE_URI': SQLALCHEMY_DATABASE_URI, 'SQLALCHEMY_TRACK_MODIFICATIONS': False, 'ID_FIELD': ID_FIELD, 'ITEM_LOOKUP_FIELD': ID_FIELD, 'DOMAIN': DOMAIN, } app = Eve(validator=ValidatorSQL, data=SQL, settings=SETTINGS) db = app.data.driver Base.metadata.bind = db.engine db.Model = Base app.run(debug=True) if __name__ == '__main__': '''Test area''' #create_entries() run() ，或import json import requests u4 = { 'login': 'user4', } # users get works r = requests.get('http://localhost:5000/users') print(r.text) # user creation works r = requests.post('http://localhost:5000/users', json=u4) print(r.text) # roles get works r = requests.get('http://localhost:5000/roles') print(r.text) # user creation with roles fail u5 = { 'login': 'user5', 'roles': [1,] } r = requests.post('http://localhost:5000/users', json=u5) print(r.text) # {"_issues": {"roles": ["field 'roles' could not be coerced", "must be of integer type"]}, "_status": "ERR"} # user patch with role fails r = requests.get('http://localhost:5000/users/1') patch_headers = {"If-Match": r.json()['_etag'], 'Content-type': 'application/json; charset=utf-8'} r = requests.patch('http://localhost:5000/users/1', headers=patch_headers, json={'roles': [1,]}) print(r.text) # {"_issues": {"roles": ["field 'roles' could not be coerced", "must be of integer type"]}, "_status": "ERR"} 用户现有角色？

服务器：

Public Sub TEST()
POPage = "http://www.sample.com"
CurRow = Sheet1.UsedRange.Rows.Count

For i = 1 To CurRow
    Dim IE As New InternetExplorer
    Dim Doc As New HTMLDocument
    IE.Visible = True
    IE.navigate POPage
    Do
        DoEvents
    Loop Until IE.readyState = READYSTATE_COMPLETE
    Application.Wait (Now + TimeValue("0:00:04"))
    Set Doc = IE.document

    Application.Wait (Now + TimeValue("0:00:4"))
    Doc.getElementsByTagName("input")(0).Value = Sheet1.Range("A" & i).Value
    Doc.getElementsByTagName("button")(1).Click
    Application.Wait (Now + TimeValue("0:00:03"))

    IE.Quit
    Set Doc = Nothing
    Set IE = Nothing
    Application.Wait (Now + TimeValue("0:00:03"))
Next i
End Sub

请求：

IBM WebSphere MQ

Answer 1

我最终做的是：

1. 将SELECT X ,Y ,Z CASE Y WHEN 10 THEN X WHEN 11 THEN X * 333.3 WHEN 12 THEN X * 222.2 WHEN 13 THEN (X * 999) * 222.2 WHEN 14 THEN X * Z WHEN 15 THEN (X * 222.2) * Z END AS W FROM myTable ; 从表转换为声明性类userroles_table。
2. 使用UserRole
注册UserRole
3. 将eve_sqlalchemy添加到UserRole。

然后可以通过新的资源端点DOMAIN直接查询或修改关联表。 user_roles似乎在生成模式时隐藏了外键，因此包含与外键的关系非常重要。