fix: don't append soft delete where for insert queries with on confli…

…ct clause

internal/dbtest/query_test.go

@@ -551,6 +551,9 @@ func TestQuery(t *testing.T) {
 			}
 			return db.NewInsert().Model(new(Model))
 		},
+		func(db *bun.DB) schema.QueryAppender {
+			return db.NewInsert().Model(new(SoftDelete)).On("CONFLICT DO NOTHING")
+		},
 	}
 
 	timeRE := regexp.MustCompile(`'\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d+(\+\d{2}:\d{2})?'`)

internal/dbtest/testdata/snapshots/TestQuery-mysql5-86

@@ -0,0 +1 @@
+INSERT INTO `soft_deletes` (`id`, `deleted_at`) VALUES (DEFAULT, DEFAULT) ON CONFLICT DO NOTHING

internal/dbtest/testdata/snapshots/TestQuery-mysql8-86

@@ -0,0 +1 @@
+INSERT INTO `soft_deletes` (`id`, `deleted_at`) VALUES (DEFAULT, DEFAULT) ON CONFLICT DO NOTHING

internal/dbtest/testdata/snapshots/TestQuery-pg-86

@@ -0,0 +1 @@
+INSERT INTO "soft_deletes" AS "soft_delete" ("id", "deleted_at") VALUES (DEFAULT, DEFAULT) ON CONFLICT DO NOTHING RETURNING "id", "deleted_at"

internal/dbtest/testdata/snapshots/TestQuery-pgx-86

@@ -0,0 +1 @@
+INSERT INTO "soft_deletes" AS "soft_delete" ("id", "deleted_at") VALUES (DEFAULT, DEFAULT) ON CONFLICT DO NOTHING RETURNING "id", "deleted_at"

internal/dbtest/testdata/snapshots/TestQuery-sqlite-86

@@ -0,0 +1 @@
+INSERT INTO "soft_deletes" AS "soft_delete" ("deleted_at") VALUES (NULL) ON CONFLICT DO NOTHING RETURNING "id", "deleted_at"

query_insert.go

@@ -431,9 +431,13 @@ func (q *InsertQuery) appendOn(fmter schema.Formatter, b []byte) (_ []byte, err
 		b = q.appendSetExcluded(b, fields)
 	}
 
-	b, err = q.appendWhere(fmter, b, true)
-	if err != nil {
-		return nil, err
+	if len(q.where) > 0 {
+		b = append(b, " WHERE "...)
+
+		b, err = appendWhere(fmter, b, q.where)
+		if err != nil {
+			return nil, err
+		}
 	}
 
 	return b, nil