How to get records from the database with key=id

items = Item.all

Instead of:

items = {{"id"=>1, "title"=>"A"},
{"id"=>5, "title"=>"B"}}

How to get?

items = {"1"=>{"id"=>1, "title"=>"A"},
"5"=>{"id"=>5, "title"=>"B"}}
有帮助吗?

解决方案

For Ruby >= 2.0 or Ruby < 2.0 with backports:

Item.all.map { |r| [r.id, r.attributes] }.to_h

For Ruby < 2.0 without backports:

Hash[Item.all.map { |r| [r.id, r.attributes] }]

其他提示

You can try the following :

result = {}
Item.all.collect{|item| result[item.id] = item.as_json}
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