class Takeoff::Stage::Heroku::MigrateDatabase
Public Class Methods
dangerous?(env)
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# File lib/takeoff/stage/heroku/migrate_database.rb, line 7 def self.dangerous?(env) new(nil).dangerous?(env) end
Public Instance Methods
call(env)
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# File lib/takeoff/stage/heroku/migrate_database.rb, line 31 def call(env) unless run?(env) log "Skipping database migrations" return @app.call(env) end log "Running database migrations" execute "heroku run rake db:migrate --remote #{env[:server_remote]}" # If ActiveRecord needs to rebuild its column name cache, restart the app. if dangerous?(env) log "Restarting application" execute "heroku restart --remote #{env[:server_remote]}" end @app.call(env) end
dangerous?(env)
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# File lib/takeoff/stage/heroku/migrate_database.rb, line 11 def dangerous?(env) return @dangerous if defined?(@dangerous) return @dangerous = false unless run?(env) diff = diff(env[:deployed_commit], env[:new_commit], ["db/migrate"]) unsafe_active_record_terms = /change_column|change_table|drop_table|remove_column|remove_index|rename_column|execute/ unsafe_mongoid_terms = /renameCollection|\.drop|$rename|$set|$unset|indexes\.create|indexes\.drop/ unsafe_terms = Regexp.union(unsafe_active_record_terms, unsafe_mongoid_terms) @dangerous = diff.split("\n").any? do |line| line =~ unsafe_terms && line !~ /#\s*safe/i end end
run?(env)
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# File lib/takeoff/stage/heroku/migrate_database.rb, line 27 def run?(env) files_have_changed?(env[:deployed_commit], env[:new_commit], ["db/migrate"]) end