rails-migrations

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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