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