37 questions
Thank you for your help.Tell me about ActiveRecord.ActiveRecord automatically creates relationships and inserts data according to the column naming convention, but how do I set up columns when I want ...
PostidtitlebodyCommentidbodypost_idWhen you combine these two in a relationship, you don't know how to specify columns to retrieve data.For example, if I want to get Post.id, Post.title, Comment.id, C...
Item_id in parent table, item_id in child table, item_id as key Parent table has_many child tableChild Table Belongs_to Parent Table I want to have a one-to-many relationship like this
REST API for Android clients has been established and used by Rails.Our service's payment method is basically regular payment.The payment is made at the time of the first purchase, and the user raises...
I'm going to make an app where I can duet with a singer. I want to play the singer's voice file and the background music file, stop the singer's voice file at every section I want, and record the user...
I'm making a mobile community applicationCurrently, I record using Media Record class on AndroidThe sound quality is poor and the recorded data is very small.Can you tell me how to convert to .mp3 for...
As the title suggests, when importing a value from DB, the input value is an array. Unfortunately, it would be nice if the DB column corresponds 1:1 with each value in the array, but it is not.In DB, ...
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