With the following entity relationship structure I\'m struggling to figure out if the relationship between the LOAN and ITEM entities is valid?
i have theses tables article , article_curre开发者_运维知识库ncy, currency in database and i made HABTM between article and currency like this
Everything I\'ve seen so far is about removing duplicate entries in a database automatically.I want to stress at the beginning of this that there 开发者_StackOverflow社区is no duplicate data in the da
I\'ll try to explain this the best I can. I\'m having quite a bit of difficulty trying to figure out this logic.
This question already has answers here: 开发者_StackOverflow Closed 12 years ago. Possible Duplicate:
Is it possible to set up a double relationship in activerecord models via the generate scaffold command?
In Core Data, I\'ve got three entities in my model: Worker, Task, and SubTask. Each has a to-many relationship to the entity below it and a to-one inverse. Worker has ma开发者_如何学编程ny Tasks, each
I\'m trying to create a many-to-many relationship between two types of which one is an Enumerated type. Lets say the first model is User and the second model is Role. A user can have many roles and a
I have the following scheme: My site is a trivia game, so every Question \"hasMany\" Answers, but a Question also \"hasOne\" correct Answer that is also represented by the Answer model.
I have an application that uses one-to-many relationshipped objects like oreder-o开发者_StackOverflow中文版rderDetails, vith EntityFramework.
加载中,请稍侯......