relationship

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SQLAlchemy: relationship between tables using keys of different types?

I need to relate two tables using SQLAlchemy 0.7; one is in a MySQL database, and the other is in an Oracle database.[详细]

2023-04-05 10:02 分类：问答
SQLAlchemy Declarative + relationships across multiple different databases

It took me a while, but I figured out how to use SQLAlchemy to model a relationship across two different kinds of databases:[详细]

2023-04-04 21:28 分类：问答
How to relate or associate an object in JavaScript to an HTML element?

How to relate or associate an object in JavaScript to an HTML element? For each object in an array, I generate a checkbox input element based on that object.[详细]

2023-04-04 03:57 分类：问答
Core Data multiple relationships to same entity

I\'ve been studying Core Data quite a bit now, and I\'ve now decided it\'s time to use it in a new project I\'m doing.[详细]

2023-04-03 22:08 分类：问答
Add ability to set nil for a relationship core-data

I have two entity with a many-to-one relationship. For example Employee <<---> Shop. When I create a new employee, I can choose a shop for it. I fetch all the available shops and then I selec[详细]

2023-04-03 19:18 分类：问答
How to implement one-to-one, one-to-many and many-to-many relationships while designing tables?

Can anyone explain how to implement one-to-one, one-to-ma开发者_运维问答ny and many-to-many relationships while designing tables with some examples?One-to-one: Use a foreign key to the referenced tabl[详细]

2023-04-02 11:48 分类：问答
Core Data: does delete an entity remove all relationships of other entities to it?

Say if I have two entities: MySubscription and AllSubscription, MySubscription has a one to one relationship to AllSubscription, thus AllSubscription has a inverse relationship to MySubscription, say:[详细]

2023-04-02 04:33 分类：问答
MySQL Many-to-Many Relationship Select Conditions

I have two tables books and tags which are in a many-to-many relationship via the table books_tags. What I want to do is select all books that have one or more tag(s) like \'%tag%\'. No problem. Howev[详细]

2023-04-02 01:56 分类：问答
Relationship clasess has attribute error

Why relationship classes attribute is not attribute? $ rs = ResourceServer.new => #<ResourceServer id: nil, resource_id: nil, server_id: nil, created_at: nil, updated_at: nil>[详细]

2023-04-01 10:19 分类：问答
Dynamics crm 2011 addlink with relationship campaignlist_association

Relationship relation = new Relationship(\"campaignlist_association\"); Entity campaign = (from c in orgServiceContext.CreateQuery(\"campaign\")[详细]

2023-04-01 03:59 分类：问答