Batch update for cases gives a warning and then fatal error if only one case is in the list (#1275) · Issues · Development / Core

Batch update for cases gives a warning and then fatal error if only one case is in the list

I also see this on dmaster.demo, and I'm still trying to see the exact triggers to reproduce and when it started, but what seems to be a consistent one is:

First set up a profile that has a case field in it, e.g. a profile that just has case status.
Do a find cases that results in only one search result.
Select it and choose update multiple cases from the actions dropdown.
You'll get a warning like Notice: Undefined property: CRM_Core_DAO::$case_id in CRM_Core_Form_Task::preProcessCommon() (line 139 of /srv/buildkit/build/dmaster/web/sites/all/modules/civicrm/CRM/Core/Form/Task.php).
If you continue and select your profile, you then get a fatal error where it's obvious the problem is that it wasn't able to obtain the case id (the IN () part):

[message] => DB Error: syntax error
    [mode] => 16
    [debug_info] => 
  SELECT  contact.id as contactId, civicrm_case.id as componentId, contact.sort_name as sort_name, email as email
    FROM  civicrm_case as civicrm_case 
INNER JOIN civicrm_case_contact ccs ON (ccs.case_id = civicrm_case.id)
INNER JOIN civicrm_contact contact ON ( contact.id = ccs.contact_id ) LEFT JOIN civicrm_email email ON ( contact.id = email.contact_id AND email.is_primary = 1 ) 
   WHERE  civicrm_case.id IN ()
    GROUP BY civicrm_case.id, contact.id

I also see this on dmaster.demo, and I'm still trying to see the exact triggers to reproduce and when it started, but what seems to be a consistent one is:

1. First set up a profile that has a case field in it, e.g. a profile that just has case status.
2. Do a find cases that results in only one search result.
3. Select it and choose update multiple cases from the actions dropdown.
4. You'll get a warning like `Notice: Undefined property: CRM_Core_DAO::$case_id in CRM_Core_Form_Task::preProcessCommon() (line 139 of /srv/buildkit/build/dmaster/web/sites/all/modules/civicrm/CRM/Core/Form/Task.php)`.
5. If you continue and select your profile, you then get a fatal error where it's obvious the problem is that it wasn't able to obtain the case id (the `IN ()` part):
```
[message] => DB Error: syntax error
    [mode] => 16
    [debug_info] => 
  SELECT  contact.id as contactId, civicrm_case.id as componentId, contact.sort_name as sort_name, email as email
    FROM  civicrm_case as civicrm_case 
INNER JOIN civicrm_case_contact ccs ON (ccs.case_id = civicrm_case.id)
INNER JOIN civicrm_contact contact ON ( contact.id = ccs.contact_id ) LEFT JOIN civicrm_email email ON ( contact.id = email.contact_id AND email.is_primary = 1 ) 
   WHERE  civicrm_case.id IN ()
    GROUP BY civicrm_case.id, contact.id
```

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