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モデルがカラムの情報をキャッシュして持っているから 間違ってたら突っ込み希望です 参照サイト Active Record Migrations — RubyonRails Guides activerecord - Model.reset_column_information does not reload columns in rails migration - Stack Overflow reset_column_information - IwazerReport => db:migrateでカラム変更してもモデルがカラム情報を保持しているのでreset_column_informationしないとうまく動かないという理解 db:migrate後のモデル操作例 以下のようなコードを用意する # db/migrate/20140306063809_create_products.
gfx
2016/11/15
●ActiveRecord
●migration
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