codegen: CreateUpdateDelete test no longer creates an "Update" block if there's no updateable fields

pkg/schema/table.go

@@ -76,3 +76,21 @@ func (t Table) HasSoftDelete() bool {
 	}
 	return hasIsDeleted && hasDeletedAt
 }
+
+// GetUpdateableColumns returns the columns that should be written to by an "update" operation.
+func (t Table) GetUpdateableColumns() (ret []Column) {
+	hasCreatedAt, _ := t.HasAutoTimestamps()
+	for _, col := range t.Columns {
+		if col.Name == "rowid" || col.IsPrimaryKey {
+			continue // Rowid / primary key is never updateable
+		}
+		if col.Name == "created_at" && hasCreatedAt {
+			continue // Update shouldn't write `created_at`
+		}
+		if t.HasSoftDelete() && (col.Name == "is_deleted" || col.Name == "deleted_at") {
+			continue // Soft-delete state is managed by SoftDeleteXyz(), not by updates
+		}
+		ret = append(ret, col)
+	}
+	return
+}