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3014zhangshuo/migration.rb

Created January 15, 2019 08:14
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Rails error unkown primary key for table but the id exist
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migration.rb
class AddPrimaryKeyToCollections < ActiveRecord::Migration
def change
execute "ALTER TABLE collections ADD PRIMARY KEY (id);"
end
end
# https://stackoverflow.com/questions/18056162/getting-unknown-primary-key-for-table-while-the-id-is-there
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