如何将ActiveRecord Create用于Ruby on Rails的多个记录？

Question

I have a ruby method that returns multiple records with 7 columns. I want to insert these records to the other table which has more than 15 columns.

How can I use the ActiveRecord Create method in my model to insert those records to match exactly into the new table which has the same column name.

Ex:

I have a model method like the following:

def self.record_letter_group
  .....
end

In the console, when i try to run this method, it returns the following records

([#<Letter::Group User_ID: "sri", Code: "12345", Group_ID: 15>, 
  #<Letter::Group User_ID: "sri", Code: "12445", Group_ID: 15>,
  #<Letter::Group User_ID: "sri", Code: "12545", Group_ID: 15>,
  #<Letter::Group User_ID: "sri", Code: "12645", Group_ID: 15>,
  #<Letter::Group User_ID: "sri", Code: "12745", Group_ID: 15>,
])

I want to do something like,

save_records = Letter::Category.create(record_letter_group)

Note: This Letter::Category has 15 columns

Thanks

Answer 1

It should look something like this:

# whitelist the attributes you want to save to "categories" table
valid_attributes = [ :User_ID, :Code, :Group_ID ]


record_letter_group_attributes = record_letter_group.map { |group| group.attributes.slice(*valid_attributes) }

save_records = Letter::Category.create(record_letter_group_attributes)