From 94377a8dea66f70fb4df8af5cb0f3914e87b887b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ferdinand=20M=C3=BCtsch?= <ferdinand@muetsch.io>
Date: Sun, 2 Oct 2022 11:31:32 +0200
Subject: [PATCH] fix: summary items id type (see #416)

---
 migrations/20221002_fix_summary_id_types.go | 77 +++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 migrations/20221002_fix_summary_id_types.go

diff --git a/migrations/20221002_fix_summary_id_types.go b/migrations/20221002_fix_summary_id_types.go
new file mode 100644
index 0000000..b05866d
--- /dev/null
+++ b/migrations/20221002_fix_summary_id_types.go
@@ -0,0 +1,77 @@
+package migrations
+
+import (
+	"github.com/muety/wakapi/config"
+	"github.com/muety/wakapi/models"
+	"gorm.io/gorm"
+	"strings"
+)
+
+// fix for https://github.com/muety/wakapi/issues/416
+
+func init() {
+	const name = "20221002-fix_summary_id_types"
+
+	f := migrationFunc{
+		name: name,
+		f: func(db *gorm.DB, cfg *config.Config) error {
+			if cfg.Db.Dialect != config.SQLDialectMysql {
+				return nil
+			}
+
+			if !db.Migrator().HasTable(&models.Summary{}) || !db.Migrator().HasTable(&models.SummaryItem{}) {
+				return nil
+			}
+
+			var currentType string
+			if err := db.
+				Table("information_schema.columns").
+				Select("data_type").
+				Where("table_name = ?", "summary_items").
+				Where("column_name = ?", "summary_id").
+				Limit(1).
+				Row().Scan(&currentType); err != nil {
+				return err
+			}
+
+			if strings.ToLower(currentType) != "int" {
+				if db.Migrator().HasConstraint(&models.SummaryItem{}, "fk_summaries_editors") {
+					if err := db.Migrator().DropConstraint(&models.SummaryItem{}, "fk_summaries_editors"); err != nil {
+						return err
+					}
+				}
+				if db.Migrator().HasConstraint(&models.SummaryItem{}, "fk_summaries_languages") {
+					if err := db.Migrator().DropConstraint(&models.SummaryItem{}, "fk_summaries_languages"); err != nil {
+						return err
+					}
+				}
+				if db.Migrator().HasConstraint(&models.SummaryItem{}, "fk_summaries_machines") {
+					if err := db.Migrator().DropConstraint(&models.SummaryItem{}, "fk_summaries_machines"); err != nil {
+						return err
+					}
+				}
+				if db.Migrator().HasConstraint(&models.SummaryItem{}, "fk_summaries_operating_systems") {
+					if err := db.Migrator().DropConstraint(&models.SummaryItem{}, "fk_summaries_operating_systems"); err != nil {
+						return err
+					}
+				}
+				if db.Migrator().HasConstraint(&models.SummaryItem{}, "fk_summaries_projects") {
+					if err := db.Migrator().DropConstraint(&models.SummaryItem{}, "fk_summaries_projects"); err != nil {
+						return err
+					}
+				}
+
+				if err := db.Migrator().AlterColumn(&models.Summary{}, "id"); err != nil {
+					return err
+				}
+				if err := db.Migrator().AlterColumn(&models.SummaryItem{}, "summary_id"); err != nil {
+					return err
+				}
+			}
+
+			return nil
+		},
+	}
+
+	registerPreMigration(f)
+}