read column from database and add to array in rails

Question

I have a table in database, name of table is tags and This table has 2 columns: 1.name, 2.count. I want read first column and add to an array and seprate names with "," . I use below code:

@list = Array.new
temp = Tag.all
@list || temp.map(&:name).join(",")

I want create list like below sample:

"name1","name2",..,"namen"

I want pass this array to a javascript. I asked a question ; I want create array type like this: ["name1","name2"]. How can I convert @list to this type?

Answer 1

Tag.pluck(:name) will create an array of names from the tags database

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To add to an array , you'll want to do this:

@list ||= Tag.all.map(&:name)
@list << Tag.find 15 # -> if you wanted to add to the array

Arrays are already joined with a , - you don't need to do that. If you wanted a string of names which is joined by , , you'll want to convert the array to a string first

Answer 2

if you have rails 3.2~> then use

Tag.pluck(:name)

and if your rails old then use

@list = Tag.all.map(&:name).join(",")