I am writing a new app with Rails so I have an id column on every table. What is the best practice for enforcing domain constraints using foreign keys? I\'ll outline my thoughts and frustration.
i have an problem and error when include markerclusterer.js in开发者_开发问答 my code.. when i run the program, the error below shown:
M29****733 2022-05-07 05:55 玫瑰花我们都知道是象征着爱情，平时不管是生日还是情人节的时候，很多男生都会买玫瑰花送给自己的爱人，经常买鲜花的朋友对玫瑰花的价格都有了解，但是对于很多没有买过的朋友来说
Sorry in advance as this question is similar (but not the same!) to others. Anyway, I need to be able to generate surrogate keys in more than one location to be synchronized at a later time. I was co
I realise there might be similar questions but I couldn\'t find one that was close enough for guidance.
I\'m mapping an existing database structure into Django models. I have开发者_C百科 a many-to-many structure where the association table is natural-keyed:
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