feat: entgo query .

entgo/query/order.go

@@ -0,0 +1,45 @@
+package entgo
+
+import (
+	"strings"
+
+	"entgo.io/ent/dialect/sql"
+)
+
+// QueryCommandToOrderConditions 查询命令转换为排序条件
+func QueryCommandToOrderConditions(orderBys []string) (error, func(s *sql.Selector)) {
+	if len(orderBys) == 0 {
+		return nil, nil
+	}
+
+	return nil, func(s *sql.Selector) {
+		for _, v := range orderBys {
+			if strings.HasPrefix(v, "-") {
+				// 降序
+				key := v[1:]
+				if len(key) == 0 {
+					continue
+				}
+
+				s.OrderBy(sql.Desc(s.C(key)))
+			} else {
+				// 升序
+				if len(v) == 0 {
+					continue
+				}
+
+				s.OrderBy(sql.Asc(s.C(v)))
+			}
+		}
+	}
+}
+
+func BuildOrderSelector(orderBys []string, defaultOrderField string) (error, func(s *sql.Selector)) {
+	if len(orderBys) == 0 {
+		return nil, func(s *sql.Selector) {
+			s.OrderBy(sql.Desc(s.C(defaultOrderField)))
+		}
+	} else {
+		return QueryCommandToOrderConditions(orderBys)
+	}
+}