Sha256: 9e0c044918207e6ebba1701c70329d92e46b707b9602e9b2fbc94e74c9f0c583
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Size: 1.3 KB
Versions: 6
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Stored size: 1.3 KB
Contents
module LolDba
class MigrationFormatter
def initialize(indexes)
@indexes = indexes
end
def puts_migration_content
formated_indexes = format_for_migration(@indexes)
if formated_indexes.blank?
puts 'Yey, no missing indexes found!'
else
puts migration_instructions(formated_indexes)
end
end
def format_for_migration(missing_indexes)
add = []
missing_indexes.each do |table_name, keys_to_add|
keys_to_add.each do |key|
next if key.blank?
add << format_index(table_name, key)
end
end
add
end
def format_index(table_name, key)
if key.is_a?(Array)
keys = key.collect { |col| ":#{col}" }
"add_index :#{table_name}, [#{keys.join(', ')}]"
else
"add_index :#{table_name}, :#{key}"
end
end
def migration_instructions(formated_indexes)
<<-MIGRATION
* TIP: if you have a problem with the index name('index name too long'), you can
solve with the :name option. Something like :name => 'my_index'.
* run `rails g migration AddMissingIndexes` and add the following content:
class AddMissingIndexes < ActiveRecord::Migration
def change
#{formated_indexes.sort.uniq.join("\n ")}
end
end
MIGRATION
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems