/
fields.go
63 lines (58 loc) · 1.3 KB
/
fields.go
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package genddl
import (
"go/types"
"strings"
)
type columnInfo struct {
name string
typeName string
tagMap map[string]string
}
func columnsByFields(t types.Type, ti *types.Info, tagText string, prefix string) []columnInfo {
tag := parseTag(tagText)
if tag == nil || tag["db"] == "" || tag["db"] == "-" {
return nil
}
if _, ok := tag["nested"]; ok {
prefix := prefix + tag["db"]
return columnsByStruct(t, ti, prefix)
}
name := tag["db"]
var typeName string
for {
if _, ok := supportedTypes[t.String()]; ok {
nt := t.(*types.Named)
typeName = strings.Join([]string{nt.Obj().Pkg().Name(), nt.Obj().Name()}, ".")
break
}
if ta, ok := t.(*types.Named); ok {
t = ta.Underlying()
continue
} else {
typeName = t.String()
break
}
}
return []columnInfo{
{name: prefix + name, typeName: typeName, tagMap: tag},
}
}
func columnsByStruct(t types.Type, ti *types.Info, prefix string) []columnInfo {
tn, ok := t.(*types.Named)
if !ok {
return nil
}
ut := tn.Underlying()
st, ok := ut.(*types.Struct)
if !ok {
return nil
}
columns := make([]columnInfo, 0, st.NumFields())
for i := 0; i < st.NumFields(); i++ {
field := st.Field(i)
tagText := st.Tag(i)
cs := columnsByFields(field.Type(), ti, tagText, prefix)
columns = append(columns, cs...)
}
return columns
}