[英]Oracle database schema using SQLAlchemy
I have a problem with SqlAlchemy. 我有SqlAlchemy问题。 When I define the schema in my Oracle database, foreign keys are not recognized in other tables.
当我在Oracle数据库中定义架构时,在其他表中无法识别外键。 Tested without using layout and it worked.
在不使用布局的情况下进行了测试,并且有效。 But I need to define the schema of this application because the user is not the owner of the tables.
但是我需要定义此应用程序的架构,因为用户不是表的所有者。 I would like your help to solve this problem.
我希望您能帮助您解决这个问题。 code:
码:
Base = declarative_base()
SCHEMA = {'schema' : 'SIATDESV'}
class Pgdasd(Base):
__tablename__ = 'PGDASD'
__table_args__ = SCHEMA
PGDASD_00000_ID_DECLARACAO = Column(String(17), primary_key = True)
class Pgdasd_01000(Base):
__tablename__ = 'pgdasd_01000'
__table_args__ = SCHEMA
PGDASD_00000_ID_DECLARACAO = Column(String, ForeignKey('PGDASD.PGDASD_00000_ID_DECLARACAO'))
PGDASD_01000_NRPAGTO = Column(String, primary_key = True)
error: *Foreign key associated with column 'pgdasd_01000.PGDASD_00000_ID_DECLARACAO' could not find table 'PGDASD' with which to generate a foreign key to target column 'PGDASD_00000_ID_DECLARACAO'* 错误: *与列'pgdasd_01000.PGDASD_00000_ID_DECLARACAO'相关的外键找不到表'PGDASD',通过该表生成指向目标列'PGDASD_00000_ID_DECLARACAO'的外键
thanks! 谢谢!
Step 1: check that table(s) are created in db. 步骤1:检查已在db中创建表。 BTW How did you create these tables?
顺便说一句,您是如何创建这些表的? Have you run
metadata.create_all()
method ? 您是否运行过
metadata.create_all()
方法?
Step 2: Try to add the name of the schema to the ForeignKey defintion: 步骤2:尝试将架构名称添加到ForeignKey定义中:
Base = declarative_base()
SCHEMA = {'schema' : 'SIATDESV'}
class Pgdasd(Base):
__tablename__ = 'PGDASD'
__table_args__ = SCHEMA
PGDASD_00000_ID_DECLARACAO = Column(String(17), primary_key = True)
class Pgdasd_01000(Base):
__tablename__ = 'pgdasd_01000'
__table_args__ = SCHEMA
PGDASD_00000_ID_DECLARACAO = Column(String, ForeignKey('SIATDESV.PGDASD.PGDASD_00000_ID_DECLARACAO'))
PGDASD_01000_NRPAGTO = Column(String, primary_key = True)
If this will help you may also make code to use schema value to avoid hardcoding the schema. 如果这样做会帮助您,还可以使代码使用模式值来避免对模式进行硬编码。
PGDASD_00000_ID_DECLARACAO = Column(String, ForeignKey(SCHEMA['schema']+'.PGDASD.PGDASD_00000_ID_DECLARACAO'))
PS: Anyway it is always useful to check SQLAlchemy log what SQL queries it generates. PS:无论如何,检查SQLAlchemy日志总是有用的,它会生成什么SQL查询。
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