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64 lines
1.2 KiB
Go
64 lines
1.2 KiB
Go
package builder
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import (
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"fmt"
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"reflect"
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"strings"
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)
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const dbTag = "db"
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// RawFieldNames converts golang struct field into slice string.
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func RawFieldNames(in interface{}, postgresSql ...bool) []string {
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out := make([]string, 0)
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v := reflect.ValueOf(in)
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if v.Kind() == reflect.Ptr {
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v = v.Elem()
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}
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var pg bool
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if len(postgresSql) > 0 {
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pg = postgresSql[0]
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}
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// we only accept structs
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if v.Kind() != reflect.Struct {
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panic(fmt.Errorf("ToMap only accepts structs; got %T", v))
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}
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typ := v.Type()
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for i := 0; i < v.NumField(); i++ {
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// gets us a StructField
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fi := typ.Field(i)
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if tagv := fi.Tag.Get(dbTag); tagv != "" {
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if pg {
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out = append(out, tagv)
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} else {
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out = append(out, fmt.Sprintf("`%s`", tagv))
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}
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} else {
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if pg {
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out = append(out, fi.Name)
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} else {
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out = append(out, fmt.Sprintf("`%s`", fi.Name))
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}
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}
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}
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return out
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}
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// PostgreSqlJoin concatenates the given elements into a string.
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func PostgreSqlJoin(elems []string) string {
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b := new(strings.Builder)
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for index, e := range elems {
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b.WriteString(fmt.Sprintf("%s = $%d, ", e, index+2))
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}
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if b.Len() == 0 {
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return b.String()
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}
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return b.String()[0 : b.Len()-2]
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}
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