Multiple scoped has_many through relationship in Rails 4
128698
Losing an Attribute When Saving Through an Association w/ Scope (Rails 4.0.0)
83299
Rails: Calling one Model from another Model. Why is this not possible?
64483
Inserting into related tables
141510
Querying from Multiple Objects
39314
Parent and children relationships accessible via trigger?
35782
Rails -- how to populate parent object id using nested attributes for child object and strong parameters?
149745
Simulate FULL OUTER JOIN with Access on more than two tables
100517
KeyError when adding objects to SQLAlchemy association object
53894
Multiple join conditions using the $lookup operator
50477
Why does attr_accessor clobber the existing variables in this model in Ruby on Rails?
117739
How to filter SQL results in a has-many-through relation
143850
collection_select, undefined method `map' for nil:NilClass
98058
Ordered associations
35474
How can I dynamically change the Active Record database for all models in Ruby on Rails?
48886
Is there documentation for the Rails column types?
102909
Problem constructing Association tables with some operators
114356
Select Permissions Across Multiple Schemas Within the Same Database