php - Codeigniter 3 consecutive transactions not working -

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some context first. have controller manage sites. sites can participate study. when site participates study, empty survey object created. participation has link survey.

simplified version of controller code:

$survey = new survey(); //set variables  $savedsurvey = $this->surveymodel->persist($survey);  if ($savedsurvey)      $participation->survey_id = $savedsurvey->id;   $savedparticipation = $this->participationmodel->persist($participation);

the persist function straightforward , looks same models.

$sql = "insert table (a, b, c) values (?, ?, ?)"; $params = array($object->a, $object->b, $object->c);  $this->db->trans_start(); $this->db->query($sql, $params); $object->id = $this->db->insert_id(); $this->db->trans_complete();  if ($this->db->trans_status() === false) {     error_log('survey insert ko');     return false; } else {     error_log('survey insert ok');     return $object; }

this straightforward transaction use, described in ci documentation. php error log shows survey inserted , participation inserted successfully. however, mysql logs paint different story:

55 query    start transaction 55 query    insert survey (survey_class_id, status, created_at)                     values ('2', 1, now()) 55 query    commit 55 query    insert participation (study_id, site_id, fs_folder_id, survey_id, reference, created_at)                     values (1, '33', null, 49, 'redville', now()) 55 quit

not participation insert have no transaction start , no commit, code returns successful operation (quite misleading) , query without transaction not insert. there no participation record in table auto index incremented. it's if second persist failed , there transaction start , rollback not show in mysql log. if manually copy query in mysql log , execute it, insert works , record added table.

i have asked on ci forums , searched similar problems haven't found anything.

  1. if don't use transactions, works (not solution me)
  2. i have tried both automatic ci transactions , manual ones same results.
  3. it isn't model issue. if instead of inserting survey , inserting participation try insert 2 participations, first 1 added.
  4. i didn't have bug in ci v2 makes me wonder if it's bug v3 find unlikely nobody have ran issue before it's basic operation.

i ran out of ideas test why doesn't work , use input outside and/or experience way ci3 handles transactions.

bug disappeared when upgrading version of php 5.5.10 5.6.10

in order try more accurate estimate of version fixing bug tried php 5.5.22 works (couldn't between , 5.5.10 mamp).

i checked php changelog , noticed version 5.5.12:

mysqli: fixed problem in mysqli_commit()/mysqli_rollback() second parameter (extra comma) , third parameters (lack of escaping).

which doesn't link further details thing in change logs seems related issue , matches versions have bug (before 5.5.10 & after 5.5.22).


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