Merge branch 'haietza-issue-367' into release

db/install.xml

@@ -58,7 +58,7 @@
         <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
       </KEYS>
       <INDEXES>
-        <INDEX NAME="result" UNIQUE="true" FIELDS="id, content_id, user_id"/>
+        <INDEX NAME="results" UNIQUE="false" FIELDS="content_id, user_id" />
       </INDEXES>
     </TABLE>
     <TABLE NAME="hvp_content_user_data" COMMENT="Stores user data about the content">

db/upgrade.php

@@ -520,6 +520,20 @@ function hvp_upgrade_2020082800() {
     }
 }
 
+/**
+ * Drop old unused unique index, add nonunique index.
+ */
+function hvp_upgrade_2020091500() {
+  global $DB;
+  $dbman = $DB->get_manager();
+  $table = new xmldb_table('hvp_xapi_results');
+  $index = new xmldb_index('results', XMLDB_INDEX_NOTUNIQUE, ['content_id', 'user_id']);
+  $dbman->add_index($table, $index);
+
+  $oldindex = new xmldb_index('result', XMLDB_INDEX_UNIQUE, ['id', 'content_id', 'user_id']);
+  $dbman->drop_index($table, $oldindex);
+}
+
 function hvp_upgrade_2020112600() {
     global $DB;
     $dbman = $DB->get_manager();
@@ -575,6 +589,7 @@ function xmldb_hvp_upgrade($oldversion) {
         2020080400,
         2020080401,
         2020082800,
+        2020091500,
         2020112600,
     ];