To make an automatic ActiveRecord database connection using ENV['DATABASE_URL'] The following snippet can be used:
From ActiveRecord 3.2 …
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"Ruby script connect to DB using database.yml"
To connect to a rails style DB config outside of the normal workflow, or using a database.yml in a …
read more"ORM(Activerecord) or Ruby Sort"
Based on an old Article I wrote, investigating incase sensitive sorting performance.
I have an active record model call Tag …
read more"Activerecord Find All/Multiple"
Using Tags (An active record model) to find tags by the tag property:
read moreTag.find_by_tag("Ruby") Ruby Tag.find_by_tag(["Ruby …"Error: NoMethodError: undefined method `compact' for nil:NilClass"
When running a sequel migration I kept getting this error:
Error: NoMethodError: undefined method `compact' for nil:NilClassMy setup …
read more"Active Record attributes simplify update and create."
In Active Record when updating records I used to have an very manual process to this some thing like:
read more@todo …"Active Record create unique or return existing element"
When working with databases it is often a requirement to have unique elements (columns) which are not the primary key …
read more"Activerecord queries on table joins"
An example of joining tables through active record models. There is a good tutorial on the basics of Activerecord joins …
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