From 3b520b35c0c325350bcfcaa3161e78a3d18f503c Mon Sep 17 00:00:00 2001
From: Tobias Rohloff <tobias.rohloff@hpi.de>
Date: Mon, 27 Aug 2018 11:53:00 +0200
Subject: [PATCH] Fix db schema migration and run it for affected users

---
 .../models/migrate/RealmSchemaMigration.java  | 42 ++++++++++++-------
 build.gradle                                  |  2 +-
 2 files changed, 28 insertions(+), 16 deletions(-)

diff --git a/app/src/main/java/de/xikolo/models/migrate/RealmSchemaMigration.java b/app/src/main/java/de/xikolo/models/migrate/RealmSchemaMigration.java
index 8ce9cf61e..f204f1e69 100644
--- a/app/src/main/java/de/xikolo/models/migrate/RealmSchemaMigration.java
+++ b/app/src/main/java/de/xikolo/models/migrate/RealmSchemaMigration.java
@@ -31,22 +31,34 @@ public void migrate(DynamicRealm realm, long oldVersion, long newVersion) {
         }
 
         if (oldVersion == 2) {
-            schema.create("Document")
-                .addField("id", String.class, FieldAttribute.PRIMARY_KEY)
-                .addField("title", String.class)
-                .addField("description", String.class)
-                .addRealmListField("tags", String.class)
-                .addField("isPublic", boolean.class)
-                .addRealmListField("courseIds", String.class);
+            // Document and DocumentLocalization were not added for some user,
+            // therefore a fix was provided with the next version.
 
-            schema.create("DocumentLocalization")
-                .addField("id", String.class, FieldAttribute.PRIMARY_KEY)
-                .addField("title", String.class)
-                .addField("description", String.class)
-                .addField("language", String.class)
-                .addField("revision", int.class)
-                .addField("fileUrl", String.class)
-                .addField("documentId", String.class);
+            oldVersion++;
+        }
+
+        if (oldVersion == 3) {
+            // This DB version only fixes the last one.
+            if (!schema.contains("Document")) {
+                schema.create("Document")
+                        .addField("id", String.class, FieldAttribute.PRIMARY_KEY)
+                        .addField("title", String.class)
+                        .addField("description", String.class)
+                        .addRealmListField("tags", String.class)
+                        .addField("isPublic", boolean.class)
+                        .addRealmListField("courseIds", String.class);
+            }
+
+            if (!schema.contains("DocumentLocalization")) {
+                schema.create("DocumentLocalization")
+                        .addField("id", String.class, FieldAttribute.PRIMARY_KEY)
+                        .addField("title", String.class)
+                        .addField("description", String.class)
+                        .addField("language", String.class)
+                        .addField("revision", int.class)
+                        .addField("fileUrl", String.class)
+                        .addField("documentId", String.class);
+            }
 
             oldVersion++;
         }
diff --git a/build.gradle b/build.gradle
index cfdfbb3cf..a5d2fd6bc 100644
--- a/build.gradle
+++ b/build.gradle
@@ -13,7 +13,7 @@ buildscript {
         versionCode         = 44
 
         xikoloApiVersion    = 3
-        realmSchemaVersion  = 3
+        realmSchemaVersion  = 4
     }
     repositories {
         jcenter()