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sort.go
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sort.go
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package dbre
import (
errs "github.com/pkg/errors"
"fmt"
)
const (
ASC = "ASC"
DESC = "DESC"
)
type Sort struct {
SortBy string `json:"sortBy"`
SortDirection string `json:"sortDirection" example:"DESC" enums:"ASC,DESC"`
}
type SortParam struct {
SortFieldMapping map[string]string
Sort *Sort
DefaultSort *Sort
}
func SortSQL(param *SortParam) (string, error) {
if param == nil {
return "", errs.New("required sortParam")
}
if param.SortFieldMapping == nil {
return "", errs.New("required SortFieldMapping")
}
if param.Sort == nil && param.DefaultSort == nil {
return "", nil
}
if param.Sort == nil {
return fmt.Sprintf("%s %s", param.SortFieldMapping[param.DefaultSort.SortBy], param.DefaultSort.SortDirection), nil
}
if param.Sort.SortBy == "" {
return fmt.Sprintf("%s %s", param.SortFieldMapping[param.DefaultSort.SortBy], param.DefaultSort.SortDirection), nil
}
dbField, ok := param.SortFieldMapping[param.Sort.SortBy]
if !ok {
return "", errs.New("sortBy not support :" + param.Sort.SortBy)
}
return fmt.Sprintf("%s %s", dbField, param.Sort.SortDirection), nil
}