rails-migrations
What is the difference between t.belongs_to and t.references in rails?
What is the difference between t.references and t.belongs_to? Why are we having those two different words? It seems to me they do the same thing?[详细]
2023-04-13 04:57 分类：问答Rails/MySql consolidation of migrations
I have a Rails app running over a MySql DB. Is there a way to consolidate migrations? for example: lets say I have a very large table called members and I create a migration to add column name to[详细]
2023-04-10 03:33 分类：问答Rails migration: update_all with dynamic code is possible?
I\'d like to add a new field in a table. My new \"secret_code\" field in my User model should be equal to Digest::SHA1.hexdigest([Time.now, rand].join)[1..12].[详细]
2023-04-09 06:39 分类：问答How to add sequences to a migration and use them in a model?
I want to have a \"Customer\" Model with a normal primary key and another column to store a custom \"Customer Number\". In addition, I want the db to handle default Customer Numbers. I think, defining[详细]
2023-04-09 06:14 分类：问答How to create mysql function in rails test database?
I wrote a Mysql function for my rails app and i added it to my database by manual. When i开发者_StackOverflow社区 want to test the function using Rails UNIT test, it through the errors like below[详细]
2023-04-03 14:59 分类：问答"PGError: ERROR: current transaction is aborted" in rails3 migration
I\'m under Rails 3.0.9, with Ruby 1.9.2 (p290). Using Postgresql 9.0.4, and the \'pg\' gem v0.11.0 The problem is :[详细]
2023-04-01 14:32 分类：问答has_many & belongs_to migration with foreign keys and database constraints in postgres?
I\'ve searched several questions about migrations and their answers, but I didn\'t find a satisfactory solution.[详细]
2023-03-31 01:00 分类：问答Learning Rails 3.0 - Migration Help - belongsTo
I\'m working on a photo gallery app. Photo has a belongsTo relationship to Album (Album has_many realtionship to Photo) How do I create the migration that adds this relationship to the database correc[详细]
2023-03-30 12:15 分类：问答Problems with rake db:migrate
First ruby script/generate model Buyer id:integer name:string after generating Buyer model, I did rake db:migrate[详细]
2023-03-30 11:33 分类：问答Rails: how to rollback a botched migration
I\'m an idiot...screwed up a migration in Rails: thinking migrations would work like model generators (using references:modelname) I did the following:[详细]
2023-03-27 19:39 分类：问答
![Interactive visualization of a graph in python [closed]](https://www.devze.com/res/2023/04-10/09/92d32fe8c0d22fb96bd6f6e8b7d1f457.gif)
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