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feat(migration): add support for altering column nullability

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* Implement ExecuteAlterColumnNullability function
* Create alter_column_nullability template
* Add test for altering column nullability behavior
This commit is contained in:
Hein
2026-08-14 14:10:21 +02:00
parent d44945b475
commit 97139723c9
4 changed files with 86 additions and 0 deletions
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pkg/writers/pgsql/migration_writer_test.go
+38
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@@ -136,6 +136,44 @@ func TestWriteMigration_AltersColumnTypeWhenActualTypeDiffers(t *testing.T) {
}
}
func TestWriteMigration_AltersColumnNullabilityWhenNotNullDiffers(t *testing.T) {
current := models.InitDatabase("testdb")
currentSchema := models.InitSchema("public")
currentTable := models.InitTable("service_instance", "public")
currentType := models.InitColumn("rid_service_instance_type", "service_instance", "public")
currentType.Type = "text"
currentType.NotNull = true
currentTable.Columns["rid_service_instance_type"] = currentType
currentSchema.Tables = append(currentSchema.Tables, currentTable)
current.Schemas = append(current.Schemas, currentSchema)
model := models.InitDatabase("testdb")
modelSchema := models.InitSchema("public")
modelTable := models.InitTable("service_instance", "public")
modelType := models.InitColumn("rid_service_instance_type", "service_instance", "public")
modelType.Type = "text"
modelType.NotNull = false
modelTable.Columns["rid_service_instance_type"] = modelType
modelSchema.Tables = append(modelSchema.Tables, modelTable)
model.Schemas = append(model.Schemas, modelSchema)
var buf bytes.Buffer
writer, err := NewMigrationWriter(&writers.WriterOptions{})
if err != nil {
t.Fatalf("Failed to create writer: %v", err)
}
writer.writer = &buf
if err := writer.WriteMigration(model, current); err != nil {
t.Fatalf("WriteMigration failed: %v", err)
}
output := buf.String()
if !strings.Contains(output, "ALTER COLUMN rid_service_instance_type DROP NOT NULL") {
t.Fatalf("expected migration to drop NOT NULL on existing column, got:\n%s", output)
}
}
func TestWriteMigration_UsesStorageTypeForSerialAlterStatements(t *testing.T) {
current := models.InitDatabase("testdb")
currentSchema := models.InitSchema("public")