db.In, db.NotIn iterating slices (#21)

Makefile

@@ -42,8 +42,13 @@ test: test-clean
 test-all: test-clean
 	GOGC=off go test $(TEST_FLAGS) $(MOD_VENDOR) -run=$(TEST) ./...
 
+test-all-tparse: test-clean
+	GOGC=off go test $(TEST_FLAGS) $(MOD_VENDOR) -run=$(TEST) ./... -json | tparse --follow
+
 test-with-reset: db-reset test-all
 
+test-with-reset-tparse: db-reset test-all-tparse
+
 test-clean:
 	GOGC=off go clean -testcache
 

db/cond.go

@@ -2,6 +2,7 @@ package db
 
 import (
 	"fmt"
+	"reflect"
 	"strings"
 
 	"github.com/Masterminds/squirrel"
@@ -80,7 +81,6 @@ func (n *binaryExprNode) ToSql() (string, []interface{}, error) {
 func compileNodes(nodes []squirrel.Sqlizer) (q string, args []interface{}, err error) {
 	for i, node := range nodes {
 		qn, argsn, err := node.ToSql()
-
 		if err != nil {
 			return "", nil, fmt.Errorf("error compiling node %d: %w", i, err)
 		}
@@ -203,12 +203,12 @@ func NotILike(v interface{}) squirrel.Sqlizer {
 
 // In represents an IN operator. The value must be variadic.
 func In[T interface{}](v ...T) squirrel.Sqlizer {
-	return Func[T]("IN", v...)
+	return Func("IN", v...)
 }
 
 // NotIn represents a NOT IN operator. The value must be variadic.
 func NotIn[T interface{}](v ...T) squirrel.Sqlizer {
-	return Func[T]("NOT IN", v...)
+	return Func("NOT IN", v...)
 }
 
 // Raw represents a raw SQL expression.
@@ -226,15 +226,58 @@ func Func[T interface{}](name string, params ...T) squirrel.Sqlizer {
 		}
 
 		places := make([]string, len(params))
-		args := make([]interface{}, 0, len(params))
 
+		// iterating through slices
+		if reflect.TypeOf(params[0]).Kind() == reflect.Slice {
+			elements := 0
+			for _, subSlice := range params {
+				v := reflect.ValueOf(subSlice)
+				elements += v.Len()
+			}
+
+			args := make([]interface{}, 0, elements)
+
+			for i, subSlice := range params {
+				subSliceVal := reflect.ValueOf(subSlice)
+				subPlaces := make([]string, subSliceVal.Len())
+
+				for j := 0; j < subSliceVal.Len(); j++ {
+					val := subSliceVal.Index(j).Interface()
+					if sqlizer, ok := interface{}(val).(squirrel.Sqlizer); ok {
+						paramSQL, paramArgs, err := sqlizer.ToSql()
+						if err != nil {
+							return "", nil, fmt.Errorf("%s: error compiling argument %d: %w", name, i, err)
+						}
+
+						subPlaces[j] = paramSQL
+						args = append(args, paramArgs...)
+					} else if reflect.TypeOf(val).Kind() == reflect.Slice {
+						v := reflect.ValueOf(val)
+						for k := 0; k < v.Len(); k++ {
+							subPlaces[j] = paramPlaceholder
+							args = append(args, v.Index(k).Interface())
+						}
+					} else {
+						subPlaces[j] = paramPlaceholder
+						args = append(args, val)
+					}
+				}
+
+				places[i] = "(" + strings.Join(subPlaces, ",") + ")"
+			}
+
+			return name + " (" + strings.Join(places, ",") + ")", args, nil
+		}
+
+		args := make([]interface{}, 0, len(params))
 		for i, param := range params {
 			if sqlizer, ok := interface{}(param).(squirrel.Sqlizer); ok {
-				paramSql, paramArgs, err := sqlizer.ToSql()
+				paramSQL, paramArgs, err := sqlizer.ToSql()
 				if err != nil {
 					return "", nil, fmt.Errorf("%s: error compiling argument %d: %w", name, i, err)
 				}
-				places[i] = paramSql
+
+				places[i] = paramSQL
 				args = append(args, paramArgs...)
 			} else {
 				places[i] = paramPlaceholder

db/cond_test.go

@@ -4,13 +4,13 @@ import (
 	"testing"
 
 	sq "github.com/Masterminds/squirrel"
-	"github.com/goware/pgkit/v2/db"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+
+	"github.com/goware/pgkit/v2/db"
 )
 
 func TestCond(t *testing.T) {
-
 	t.Run("equal to", func(t *testing.T) {
 		cond := db.Cond{"one": 1}
 		s, args, err := cond.ToSql()
@@ -19,6 +19,14 @@ func TestCond(t *testing.T) {
 		assert.Equal(t, "one = ?", s)
 	})
 
+	t.Run("equal to with multiple parameters", func(t *testing.T) {
+		cond := db.And{db.Cond{"one": 1}, db.Cond{"two": 2}}
+		s, args, err := cond.ToSql()
+		require.NoError(t, err)
+		assert.Equal(t, []interface{}{1, 2}, args)
+		assert.Equal(t, "(one = ? AND two = ?)", s)
+	})
+
 	t.Run("equal to (inverted)", func(t *testing.T) {
 		cond := db.Cond{1: "one"}
 		s, args, err := cond.ToSql()
@@ -64,6 +72,16 @@ func TestCond(t *testing.T) {
 	})
 
 	t.Run("IN with slice", func(t *testing.T) {
+		sl1 := []int{1, 2, 3}
+		cond := db.Cond{"list": db.In(sl1...)}
+		s, args, err := cond.ToSql()
+		require.NoError(t, err)
+
+		assert.Equal(t, []interface{}{1, 2, 3}, args)
+		assert.Equal(t, "list IN (?, ?, ?)", s)
+	})
+
+	t.Run("IN with slice variadic", func(t *testing.T) {
 		cond := db.Cond{"list": db.In(1, 2, 3)}
 		s, args, err := cond.ToSql()
 		require.NoError(t, err)
@@ -72,6 +90,48 @@ func TestCond(t *testing.T) {
 		assert.Equal(t, "list IN (?, ?, ?)", s)
 	})
 
+	t.Run("multiple IN with slice", func(t *testing.T) {
+		sl1 := []int{1, 2, 3}
+		sl2 := []int{4, 5, 6}
+		cond := db.Cond{"list": db.In([]interface{}{sl1, sl2}...)}
+		s, args, err := cond.ToSql()
+		require.NoError(t, err)
+
+		assert.Equal(t, []interface{}{1, 2, 3, 4, 5, 6}, args)
+		assert.Equal(t, "list IN ((?,?,?),(?,?,?))", s)
+	})
+
+	t.Run("multiple IN with slice AND where ID", func(t *testing.T) {
+		cond := db.And{db.Cond{"list": db.In([][]string{{"1", "2", "3"}, {"3", "4", "5"}}...)}, db.Cond{"id": 1}}
+		s, args, err := cond.ToSql()
+		require.NoError(t, err)
+
+		assert.Equal(t, []interface{}{"1", "2", "3", "3", "4", "5", 1}, args)
+		assert.Equal(t, "(list IN ((?,?,?),(?,?,?)) AND id = ?)", s)
+	})
+
+	t.Run("multiple IN with struct", func(t *testing.T) {
+		randomStruct := []struct {
+			Id   uint64
+			Name string
+		}{
+			{Id: 1, Name: "Lukas"},
+			{Id: 2, Name: "David"},
+		}
+
+		data := [][]interface{}{}
+		for _, s := range randomStruct {
+			data = append(data, []interface{}{s.Id, s.Name})
+		}
+
+		cond := db.Cond{"list": db.In(data...)}
+		s, args, err := cond.ToSql()
+		require.NoError(t, err)
+
+		assert.Equal(t, []interface{}{uint64(1), "Lukas", uint64(2), "David"}, args)
+		assert.Equal(t, "list IN ((?,?),(?,?))", s)
+	})
+
 	t.Run("NOT IN", func(t *testing.T) {
 		cond := db.Cond{"list": db.NotIn("Czech Republic", "Slovakia")}
 		s, args, err := cond.ToSql()