blocks|key|609370|text|以下是所有Rails3+(ActiveRecord迁移)数据类型：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|609371|：二进制|609372|：布尔值|609373|：日期|609374|：日期时间|609375|：小数|609376|：浮动|609377|：整数|609378|:primary_key|609379|：参考|609380|：字符串|609381|：文本|609382|：时间|609383|：时间戳|609384|Source|609385|entityMap|0|LINK|mutability|MUTABLE|url|http://api.rubyonrails.org/classes/ActiveRecord/ConnectionAdapters/TableDefinition.html#method-i-column^0|5|6|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|6|0|0^^$0|@$1|2|3|4|5|6|7|1F|8|@$9|1G|A|1H|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1I|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|1J|8|@]|D|@]|E|$]]|$1|J|3|K|5|6|7|1K|8|@]|D|@]|E|$]]|$1|L|3|M|5|6|7|1L|8|@]|D|@]|E|$]]|$1|N|3|O|5|6|7|1M|8|@]|D|@]|E|$]]|$1|P|3|Q|5|6|7|1N|8|@]|D|@]|E|$]]|$1|R|3|S|5|6|7|1O|8|@]|D|@]|E|$]]|$1|T|3|U|5|6|7|1P|8|@]|D|@]|E|$]]|$1|V|3|W|5|6|7|1Q|8|@]|D|@]|E|$]]|$1|X|3|Y|5|6|7|1R|8|@]|D|@]|E|$]]|$1|Z|3|10|5|6|7|1S|8|@]|D|@]|E|$]]|$1|11|3|12|5|6|7|1T|8|@]|D|@]|E|$]]|$1|13|3|14|5|6|7|1U|8|@]|D|@]|E|$]]|$1|15|3|16|5|6|7|1V|8|@]|D|@$9|1W|A|1X|1|1Y]]|E|$]]|$1|17|3|-4|5|6|7|1Z|8|@]|D|@]|E|$]]]|18|$19|$5|1A|1B|1C|E|$1D|1E]]]]

Here are all the <code>Rails3</code> (ActiveRecord migration) datatypes:

:binary 
:boolean 
:date 
:datetime 
:decimal 
:float 
:integer 
:primary_key 
:references 
:string 
:text 
:time 
:timestamp

<a href="http://api.rubyonrails.org/classes/ActiveRecord/ConnectionAdapters/TableDefinition.html#method-i-column" rel="nofollow noreferrer">Source</a>

blocks|key|1657105|text|不仅要知道类型，还要知道这些类型到数据库类型的映射：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1657106|​|1657107|📷|atomic|offset|length|1657108|1657109|1657110|1657111|1657112|例如，请注意，在MS+SQL+Server中，我们使用：|1657113|1657114|旧的"datetime“而不是"datetime2"|ordered-list-item|1657115|decimal以其默认精度|1657116|文本和varchar而不是nvarchar|1657117|int+(不可能使用小整数/小整数/大整数)|1657118|1657119|而不是BLOB|1657120|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/ed5591907cf3005138d1bd0db9a710ae.png|imageAlt|1|https://i.stack.imgur.com/tuRiZ.png^0|0|0|0|1|0|0|0|0|0|1|1|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1C|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1D|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|1E|8|@]|9|@$G|1F|H|1G|1|1H]]|A|$]]|$1|I|3|C|5|6|7|1I|8|@]|9|@]|A|$]]|$1|J|3|C|5|6|7|1J|8|@]|9|@]|A|$]]|$1|K|3|E|5|F|7|1K|8|@]|9|@$G|1L|H|1M|1|1N]]|A|$]]|$1|L|3|C|5|6|7|1O|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|1P|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|P|3|Q|5|R|7|1R|8|@]|9|@]|A|$]]|$1|S|3|T|5|R|7|1S|8|@]|9|@]|A|$]]|$1|U|3|V|5|R|7|1T|8|@]|9|@]|A|$]]|$1|W|3|X|5|R|7|1U|8|@]|9|@]|A|$]]|$1|Y|3|-4|5|R|7|1V|8|@]|9|@]|A|$]]|$1|Z|3|10|5|6|7|1W|8|@]|9|@]|A|$]]|$1|11|3|-4|5|6|7|1X|8|@]|9|@]|A|$]]]|12|$13|$5|14|15|16|A|$17|18|19|-4]]|1A|$5|14|15|16|A|$17|1B|19|-4]]]]

It is important to know not only the types but the mapping of these types to the database types, too:

<img src="https://i.stack.imgur.com/Q0j0x.png" alt="enter image description here">

<img src="https://i.stack.imgur.com/tuRiZ.png" alt="enter image description here">

For, example, note that in MS SQL Server we are using:

<ol>
<li>the old "datetime" instead "datetime2"</li>
<li>decimal with its default precision</li>
<li>text and varchar instead nvarchar</li>
<li>int (not possible to use tiny int/small int/big int)</li>
<li>image instead BLOB</li>
</ol>

blocks|key|4278924|text|您是指定义活动记录迁移吗？或者您指的是Ruby数据类型？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4278925|这里有一个可能有助于创建迁移的链接：|4278926|Orthogonal+Thought+-+MySQL+and+Ruby+on+Rails+datatypes|offset|length|4278927|entityMap|0|LINK|mutability|MUTABLE|url|http://www.orthogonalthought.com/blog/index.php/2007/06/mysql-and-ruby-on-rails-datatypes/^0|0|0|0|1I|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@$F|S|G|T|1|U]]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]]]

Do you mean for defining active record migrations? or do you mean Ruby data types?

Here's a link that may help for creating migrations:

<a href="http://www.orthogonalthought.com/blog/index.php/2007/06/mysql-and-ruby-on-rails-datatypes/" rel="nofollow noreferrer">Orthogonal Thought - MySQL and Ruby on Rails datatypes</a>

blocks|key|2676432|text|大致了解这些数据类型的用途可能会有所帮助：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2676433|datetime+binary-用于存储图像、音频或movies.|2676434|boolean等数据-用于存储true或false值。datetime+datetime-仅存储日期|unordered-list-item|2676435|
|2676436|datetime-将日期和时间存储到column.|2676437|2676438|decimal中-用于decimals.|2676439|2676440|float+-用于小数。(What's+the+difference+between+decimal+and+float?)|offset|length|2676441|2676442|integer+-代表整个numbers.|2676443|2676444|primary_key+-唯一键，可以唯一地标识表|2676445|2676446|字符串中的每一行-用于小数据类型，如标题。(Should+you+choose+string+or+text?)|2676447|2676448|text+-用于较长的文本数据，如information.|2676449|2676450|time段落-仅用于time+|2676451|2676452|timestamp+-用于将日期和时间存储到列中。|2676453|2676454|我希望这对某些人有帮助！此外，这是官方列表：http://guides.rubyonrails.org/migrations.html#supported-types|2676455|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/8514167/float-vs-decimal-in-activerecord|1|https://stackoverflow.com/questions/3354330/difference-between-string-and-text-in-rails|2|http://guides.rubyonrails.org/migrations.html#supported-types^0|0|0|0|0|0|0|0|0|D|1C|0|0|0|0|0|0|0|M|X|1|0|0|0|0|0|0|0|0|M|1P|2|0^^$0|@$1|2|3|4|5|6|7|1P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|1R|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|1S|8|@]|9|@]|A|$]]|$1|I|3|J|5|F|7|1T|8|@]|9|@]|A|$]]|$1|K|3|H|5|6|7|1U|8|@]|9|@]|A|$]]|$1|L|3|M|5|F|7|1V|8|@]|9|@]|A|$]]|$1|N|3|H|5|6|7|1W|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|1X|8|@]|9|@$Q|1Y|R|1Z|1|20]]|A|$]]|$1|S|3|H|5|6|7|21|8|@]|9|@]|A|$]]|$1|T|3|U|5|F|7|22|8|@]|9|@]|A|$]]|$1|V|3|H|5|6|7|23|8|@]|9|@]|A|$]]|$1|W|3|X|5|F|7|24|8|@]|9|@]|A|$]]|$1|Y|3|H|5|6|7|25|8|@]|9|@]|A|$]]|$1|Z|3|10|5|F|7|26|8|@]|9|@$Q|27|R|28|1|29]]|A|$]]|$1|11|3|H|5|6|7|2A|8|@]|9|@]|A|$]]|$1|12|3|13|5|F|7|2B|8|@]|9|@]|A|$]]|$1|14|3|H|5|6|7|2C|8|@]|9|@]|A|$]]|$1|15|3|16|5|F|7|2D|8|@]|9|@]|A|$]]|$1|17|3|H|5|6|7|2E|8|@]|9|@]|A|$]]|$1|18|3|19|5|F|7|2F|8|@]|9|@]|A|$]]|$1|1A|3|-4|5|6|7|2G|8|@]|9|@]|A|$]]|$1|1B|3|1C|5|6|7|2H|8|@]|9|@$Q|2I|R|2J|1|2K]]|A|$]]|$1|1D|3|-4|5|6|7|2L|8|@]|9|@]|A|$]]]|1E|$1F|$5|1G|1H|1I|A|$1J|1K]]|1L|$5|1G|1H|1I|A|$1J|1M]]|1N|$5|1G|1H|1I|A|$1J|1O]]]]

It might be helpful to know generally what these data types are used for: 

<ul>
<li>binary - is for storing data such as images, audio, or movies.</li>
<li>boolean - is for storing true or false values.</li>
<li>date - store only the date</li>
<li>datetime - store the date and time into a column.</li>
<li>decimal - is for decimals.</li>
<li>float - is for decimals. (<a href="https://stackoverflow.com/questions/8514167/float-vs-decimal-in-activerecord">What's the difference between decimal and float?</a>)</li>
<li>integer - is for whole numbers.</li>
<li>primary_key - unique key that can uniquely identify each row in a table</li>
<li>string - is for small data types such as a title. (<a href="https://stackoverflow.com/questions/3354330/difference-between-string-and-text-in-rails">Should you choose string or text?</a>)</li>
<li>text - is for longer pieces of textual data, such as a paragraph of information.</li>
<li>time - is for time only </li>
<li>timestamp - for storing date and time into a column.</li>
</ul>

I hope that helps someone! Also, here's the official list: <a href="http://guides.rubyonrails.org/migrations.html#supported-types" rel="nofollow noreferrer">http://guides.rubyonrails.org/migrations.html#supported-types</a>

Where can I find a list of data types that can be used in rails 3? (such as text, string, integer, float, date, etc.?) I keep randomly learning about new ones, but I'd love to have a list I could easily refer to.

Rails 3 datatypes?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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在哪里可以找到可以在Rails3中使用的数据类型的列表？(如文本、字符串、整数、浮点数、日期等？)我一直在随机地学习新的东西，但我希望有一个我可以轻松参考的列表。

问Rails 3数据类型？
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