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https://github.com/silverstripe/silverstripe-framework
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35 lines
1.7 KiB
Markdown
35 lines
1.7 KiB
Markdown
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# Data Types
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These are the data-types that you can use when defining your data objects. They are all subclasses of `[api:DBField]`
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for introducing their usage.
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## Types
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* `[api:Varchar]`: A variable-length string of up to 255 characters, designed to store raw text
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* `[api:Text]`: A variable-length string of up to 2 megabytes, designed to store raw text
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* `[api:HTMLVarchar]`: A variable-length string of up to 255 characters, designed to store HTML
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* `[api:HTMLText]`: A variable-length string of up to 2 megabytes, designed to store HTML
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* `[api:Enum]`: An enumeration of a set of strings
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* `[api:Boolean]`: A boolean field.
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* `[api:Int]`: An integer field.
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* `[api:Decimal]`: A decimal number.
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* `[api:Currency]`: A number with 2 decimal points of precision, designed to store currency values.
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* `[api:Percentage]`: A decimal number between 0 and 1 that represents a percentage.
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* `[api:Date]`: A date field
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* `[api:SS_Datetime]`: A date / time field
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* `[api:Time]`: A time field
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## HTMLText vs. Text, and HTMLVarchar vs. Varchar
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The database field types HTMLVarchar and Varchar are exactly the same in the database. However, the templating engine
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knows to escape the Varchar field and not the HTMLVarchar field. So, it's important you use the right field if you
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don't want to be putting $FieldType.XML everywhere.
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If you're going to put HTML content into the field, please use the field type with the HTML prefix. Otherwise, you're
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going to risk double-escaping your data, forgetting to escape your data, and generally creating a confusing situation.
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## Usage
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* See [datamodel](/topics/datamodel) for information about **database schemas** implementing these types
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