gorm和xorm tag对比

Field Tag

gorm	xorm	gorm说明	xorm说明
column	name or 'name'	column db name	Column Name, optional
type	support over 30 kinds of column types, details in Column Types	column data type, prefer to use compatible general type, e.g: bool, int, uint, float, string, time, bytes, which works for all databases, and can be used with other tags together, like not null, size, autoIncrement… specified database data type like varbinary(8) also supported, when using specified database data type, it needs to be a full database data type, for example: MEDIUMINT UNSIGNED NOT NULL AUTO_INCREMENT	column type
serializer		specifies serializer for how to serialize and deserialize data into db, e.g: serializer:json/gob/unixtime
size		specifies column data size/length, e.g: size:256
primaryKey		specifies column as primary key
unique		specifies column as unique
default	default 0 | default 'name'	specifies column default value	column default value
precision		specifies column precision
scale		specifies column scale
not null	[not ]null | notnull	specifies column as NOT NULL	if column could be blank
autoIncrement	autoincr	specifies column auto incrementable	If autoincrement column
autoIncrementIncrement		auto increment step, controls the interval between successive column values
embedded	extends	embed the field	use for anonymous field, map the struct in anonymous field to database
embeddedPrefix		column name prefix for embedded fields
autoCreateTime	created	track current time when creating, for int fields, it will track unix seconds, use value nano/milli to track unix nano/milli seconds, e.g: autoCreateTime:nano	This field will be filled in current time on insert
autoUpdateTime	updated	track current time when creating/updating, for int fields, it will track unix seconds, use value nano/milli to track unix nano/milli seconds, e.g: autoUpdateTime:milli	This field will be filled in current time on insert or update
index	index/index(indexname)	create index with options, use same name for multiple fields creates composite indexes, refer Indexes for details	column is index. if add (indexname), the column is used for combined index with the field that defining same indexname
uniqueIndex	unique/unique(uniquename)	same as index, but create uniqued index	column is Unique index; if add (uniquename), the column is used for combined unique index with the field that defining same uniquename.
check		creates check constraint, eg: check:age > 13, refer Constraints
<-	->	set field’s write permission, <-:create create-only field, <-:update update-only field, <-:false no write permission, <- create and update permission	only write into database
->	<-	set field’s read permission, ->:false no read permission	only read from database
-	-	ignore this field, - no read/write permission, -:migration no migrate permission, -:all no read/write/migrate permission	This field will not be mapping
comment	comment	add comment for field when migration	set field comment (currently only supports mysql)
	version		This field will be filled 1 on insert and autoincrement on update