To access joined columns when using Ruby with active record, you can use the dot notation to chain the table names together, followed by the column name. For example, if you have a users table joined with a posts table on the user_id foreign key, you can access the title column of the posts table for a user like this:
user = User.joins(:posts).where(id: 1).first
post_title = user.posts.first.title
In this code, we join the posts table with the users table using .joins(:posts)
and then filter for a user with an id of 1 using .where(id: 1)
. We then use .first
to get the first user matching that condition. Finally, we can access the title of the first post for that user using user.posts.first.title
.
Please start posting anonymously - your entry will be published after you log in or create a new account. This space is reserved only for answers. If you would like to engage in a discussion, please instead post a comment under the question or an answer that you would like to discuss
Asked: 2022-02-10 11:00:00 +0000
Seen: 7 times
Last updated: Jun 18 '22
What is the process for installing SASS/Compass in the DDEV web container?
On a remote host, the cursor control and Enter key in Rubymine do not function properly.
How does async execution relate to ruby-odbc?
What is the method of utilizing Ruby to add colored text to the terminal output?
Which languages are appropriate to use for a contemporary website?
How can an HTML form and a MySQL database be updated by several users simultaneously?
What is the process of generating swagger definitions using AWS SDKs?