Add mention of sqlite constraints

Author: AlexanderShelyugov

sql-parser/sqlite.go

@@ -134,6 +134,7 @@ func (p *Parser) Visit(node sqlite.Node) (w sqlite.Visitor, n sqlite.Node, err e
 
 func (p *Parser) parseSqliteConstrains(tbName string, columnDefinition *sqlite.ColumnDefinition) []*ast.ColumnOption {
 	// https://www.sqlite.org/syntax/column-constraint.html
+	// Also, Sqlite does not support dropping constraints, so we safely can add them here
 	conss := columnDefinition.Constraints
 	opts := []*ast.ColumnOption{}
 	for _, cons := range conss {

test/sqlite/migration_test.go

@@ -21,12 +21,16 @@ func TestMigrationGeneratorSingleTable(t *testing.T) {
 		t.Fatalf("failed to parse schema: %v", err)
 	}
 
-	sqlizeCurrent.StringUp()
-	sqlizeCurrent.StringDown()
+	runVariousMigrationFunctions(t, sqlizeCurrent)
+}
+
+func runVariousMigrationFunctions(t *testing.T, s *sqlize.Sqlize) {
+	s.StringUp()
+	s.StringDown()
 
-	sqlizeCurrent.StringUpWithVersion(0, false)
-	sqlizeCurrent.StringDownWithVersion(0)
+	s.StringUpWithVersion(0, false)
+	s.StringDownWithVersion(0)
 
-	sqlizeCurrent.StringUpWithVersion(123, false)
-	sqlizeCurrent.StringDownWithVersion(123)
+	s.StringUpWithVersion(123, false)
+	s.StringDownWithVersion(123)
 }