link/vendor/gorm.io/gorm/schema/check.go
2021-06-05 20:48:24 +00:00

38 lines
957 B
Go

package schema
import (
"regexp"
"strings"
)
var (
// reg match english letters and midline
regEnLetterAndMidline = regexp.MustCompile("^[A-Za-z-_]+$")
)
type Check struct {
Name string
Constraint string // length(phone) >= 10
*Field
}
// ParseCheckConstraints parse schema check constraints
func (schema *Schema) ParseCheckConstraints() map[string]Check {
var checks = map[string]Check{}
for _, field := range schema.FieldsByDBName {
if chk := field.TagSettings["CHECK"]; chk != "" {
names := strings.Split(chk, ",")
if len(names) > 1 && regEnLetterAndMidline.MatchString(names[0]) {
checks[names[0]] = Check{Name: names[0], Constraint: strings.Join(names[1:], ","), Field: field}
} else {
if names[0] == "" {
chk = strings.Join(names[1:], ",")
}
name := schema.namer.CheckerName(schema.Table, field.DBName)
checks[name] = Check{Name: name, Constraint: chk, Field: field}
}
}
}
return checks
}