I want to do this as if I were doing it in mysql
INSERT INTO ratings
('id','app_id','user_id','created_at','updated_at','unique','valoracion','valoracions_id')
values (1,2,3,"2017-04-07","2017-04-07",12,4.8,1),
(1,2,3,"2017-04-07","2017-04-07",12,4.8,1),
(1,2,3,"2017-04-07","2017-04-07",12,4.8,1);
You can create several objects with the% create by passing a hash array, where each hash describes the attributes of the object you want to create.
The following example is found in the apidock :
# Create an Array of new objects
User.create([{ :first_name => 'Jamie' }, { :first_name => 'Jeremy' }])
Therefore for your case it should be something like this:
Rating.create([
{app_id: 1, unique: 12, valoracion: 4.8, valoracions_id: 1},
{app_id: 2, unique: 12, valoracion: 4.8, valoracions_id: 1},
{app_id: 3, unique: 12, valoracion: 4.8, valoracions_id: 1}
])
You can also iterate over each of them using each and using the values of each key on the array of hashes.
[
{ app_id: 2, user_id: 3, created_at: '2017-04-07', updated_at: '2017-04-07', unique: 12, valoracion: 4.8, valoracions_id: 1 },
{ app_id: 2, user_id: 3, created_at: '2017-04-07', updated_at: '2017-04-07', unique: 12, valoracion: 4.8, valoracions_id: 1 },
{ app_id: 2, user_id: 3, created_at: '2017-04-07', updated_at: '2017-04-07', unique: 12, valoracion: 4.8, valoracions_id: 1 }
].each do |rating|
Rating.create(
app_id: rating[:app_id],
user_id: rating[:user_id],
created_at: rating[:created_at],
updated_at: rating[:updated_at],
unique: rating[:unique],
valoracion: rating[:valoracion],
valoracions_id: rating[:valoracions_id]
)
end
And if you want to gain some time you can use Active Record Transactions in the case of make many records.
ActiveRecord::Base.transaction do
...
end