datamapper

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Problem installing gems

I had recently used datamapper, and then all of a sudden it didn\'t work.I keep getting this error: /Users/paul/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `[详细]

2023-03-13 17:03 分类：问答
"DataObjects::IntegrityError (ERROR: null value in column violates not-null constraint" error in rails 3

In my model I have class Alias include DataMapper::Resource belongs_to :user property :id, String, :key => true, :required => true, :unique => true[详细]

2023-03-13 16:20 分类：问答
Cannot find the child_model (NameError)

I am unable to determine why I am getting a name error here. I\'m new to DataMapper, but trying to associations down. Any help is appreciated.[详细]

2023-03-13 04:41 分类：问答
How can I use a range of times to select DataMapper entries?

I have a DataMapper based SQLite database.I store the time at which the data upon which the model is built as Msrun.rawtime or a property :rawtime, DateTime, of the Model Msrun.[详细]

2023-03-13 02:19 分类：问答
Cannot deploy rails 3.0/datamapper on heroku cedar

I\'m trying to deploy an new rails 3.0/datamapper application on heroku cedar. Despite I can run the console and do successful \"app.get \'\'\", every request gives the following error in the logs wi[详细]

2023-03-12 22:19 分类：问答
RSpec + DatabaseCleaner help -- teardown happening prematurely

I\'m a little lost with RSpec having always stuck to xUnit-based testing frameworks, but I\'m giving it a go.[详细]

2023-03-07 21:21 分类：问答
How to get the Nth row (or record) with Datamapper

I\'m looking for a more datamappery way of doing t开发者_运维技巧he following (since the code below is dependent on sqlite):[详细]

2023-03-06 05:35 分类：问答
What's the most efficient way to iterate through an entire table using Datamapper?

What\'s the most efficient way to iterate through an entire table using Datamapper? If I do this, does Datamapper try to pull the entire result set into memory before performing the iteration? Assum[详细]

2023-03-06 03:56 分类：问答
DataMapper Nested conditions: count issue

Here is the models: class Foo include DataMapper::Resource property :id, Serial has n, :foo_bars has n, :bars, :through => :foo_bars[详细]

2023-03-05 02:26 分类：问答
Which Ruby ORM supports PostgreSQL's Array Datatype?

I\'m need to find a Ruby ORM (Active Record, Sequel, etc) that supports PostgreSQL\'s Array column datatype.[详细]

2023-03-03 23:33 分类：问答