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rails カラムの型

string 文字列型
text テキスト(不定長文字列)型
integer 整数型
float 浮動小数点数型
decimal 固定長整数型
datetime 日時型
timestamp タイムスタンプ型
time 時刻型
date 日付型
binary バイナリ文字列型
boolean 真偽値型
references 他のテーブルへの外部キーの定義、_id が付いた整数

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265
Help us understand the problem. What are the problem?