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Web to py enterprise web framework - p 18

Chia sẻ: Yukogaru Yukogaru | Ngày: | Loại File: PDF | Số trang:10

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Web to py enterprise web framework - p 18

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MIGRATIONS 155 value is not guanarteed to be backward compatible. To avoind unwanted migrations on upgrades, we reccommend that you always specify the length for string, password and upload fields. • sets the default value for the field. The default value is used when performing an insert if a value is not explicitly specified. It is also used to prepopulate forms built from the table using SQLFORM. default • • tells the DAL that no insert should be allowed on this table if a value for this field is not explicitly specified. required is a validator or a list of validators. This is not used by the DAL, but...

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