Like to ddl pkg

ddl/arithsymbol/arithsymbol.go

@@ -21,5 +21,6 @@ const (
 	// Not e.g. is not null
 	Not ArithSymbol = "is not"
 	// In contained by a slice
-	In ArithSymbol = "in"
+	In   ArithSymbol = "in"
+	Like ArithSymbol = "like"
 )

ddl/query/query.go

@@ -148,6 +148,13 @@ func (c Criteria) In(val interface{}) Criteria {
 	return c
 }
 
+// Like set like operator and column value, val should be a slice type value
+func (c Criteria) Like(val interface{}) Criteria {
+	c.val = val
+	c.asym = arithsymbol.Like
+	return c
+}
+
 // And concat another sql expression builder with And
 func (c Criteria) And(cri Base) Where {
 	w := Where{
@@ -311,7 +318,10 @@ type PageRet struct {
 
 // NewPageRet new a PageRet
 func NewPageRet(page Page) PageRet {
-	pageNo := page.Offset/page.Size + 1
+	pageNo := 1
+	if page.Size > 0 {
+		pageNo = page.Offset/page.Size + 1
+	}
 	return PageRet{
 		PageNo:   pageNo,
 		PageSize: page.Size,

ddl/query/query_test.go

@@ -80,6 +80,9 @@ func ExampleCriteria() {
 		And(C().Col("cc.stat_type").Eq(2)).Append(String("for update"))
 	fmt.Println(where.Sql())
 
+	where = C().Col("cc.name").Like("%ba%")
+	fmt.Println(where.Sql())
+
 	// Output:
 	//((`name` = ? or `school` = ?) and `age` = ?) [wubin havard 18]
 	//((`name` = ? or `school` = ?) and `delete_at` is not null) [wubin havard]
@@ -95,4 +98,5 @@ func ExampleCriteria() {
 	//(`project_id` = ? and `delete_at` is null) for update [1]
 	//(cc.`project_id` = ? and cc.`delete_at` is null) for update [1]
 	//(((cc.`survey_id` = ? and cc.`year` = ?) and cc.`month` = ?) and cc.`stat_type` = ?) for update [abc 2021 10 2]
+	//cc.`name` like ? [%ba%]
 }