feat: entgo query .

entgo/query/query.go

@@ -0,0 +1,64 @@
+package entgo
+
+import (
+	"entgo.io/ent/dialect/sql"
+	"github.com/go-kratos/kratos/v2/encoding"
+	_ "github.com/go-kratos/kratos/v2/encoding/json"
+)
+
+const (
+	DefaultPage     = 1
+	DefaultPageSize = 10
+)
+
+// parseJsonMap 解析JSON字符串里面的MAP，包含Array形式的Map
+func parseJsonMap(strJson []byte, retMap *map[string]string) error {
+	codec := encoding.GetCodec("json")
+
+	var err error
+	if err = codec.Unmarshal(strJson, retMap); err != nil {
+		var retArray []map[string]string
+		if err1 := codec.Unmarshal(strJson, &retArray); err1 == nil {
+			for _, itemA := range retArray {
+				for k, v := range itemA {
+					(*retMap)[k] = v
+				}
+			}
+		} else {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// BuildQuerySelector 构建分页查询选择器
+func BuildQuerySelector(andFilterJsonString, orFilterJsonString string,
+	page, pageSize int32, noPaging bool,
+	orderBys []string, defaultOrderField string) (err error, whereSelectors []func(s *sql.Selector), querySelectors []func(s *sql.Selector)) {
+	err, whereSelectors = BuildFilterSelector(andFilterJsonString, orFilterJsonString)
+	if err != nil {
+		return err, nil, nil
+	}
+
+	var orderSelector func(s *sql.Selector)
+	err, orderSelector = BuildOrderSelector(orderBys, defaultOrderField)
+	if err != nil {
+		return err, nil, nil
+	}
+
+	pageSelector := BuildPaginationSelector(page, pageSize, noPaging)
+
+	if len(whereSelectors) > 0 {
+		querySelectors = append(querySelectors, whereSelectors...)
+	}
+
+	if orderSelector != nil {
+		querySelectors = append(querySelectors, orderSelector)
+	}
+	if pageSelector != nil {
+		querySelectors = append(querySelectors, pageSelector)
+	}
+
+	return
+}