title: triggering a rule only if a user filled out a certian field in his profile?
body: <p><strong>hey everyone, hope i could describe my problem properly...</strong> </p>
  
  <p>im creating an appointment notification website using drupal 7. i used a custom content type called "appointment" that is shown only to the user relevant to the appointment (im "tagging" the user in the node with entity reference module and restricting the node view only to that user with the Node access user reference module). </p>
  
  <p>the system is also supposed to notify users on upcoming appointments by SMS. i managed to get the sms framework and the rules module to trigger the sms submission prior to the date of the appointment to a predefined number.</p>
  
  <p><strong>so far, so good. my problem is -</strong></p>
  
  <p>the user has an optional profile field called "field_cellnumber" to fill out if he is interested in getting notifications to his phone... i want rules to check if the user has filled out that field, and only if so to trigger the sms submission. how could i achieve this? i tried going over all of the options in rule's "conditions" and did not find anything that could refer to the existence specific information in user profiles...</p>
  
  <p><strong>also, another problem is this -</strong>
  the field "field_cellnumber" is shared between the "appointment" node type and the user profiles (i created the field in the node type and then added to the user accounts by add existing field).
  while new "appointment" nodes are being created, i want drupal to fetch the value of "field_cellnumber" from the profile of the user that was referenced in the node by entity reference, and populate it into the node's "field_cellnumber" value automatically.
  right now the rule send's the sms but you need to manually enter the user's cell number each time creating a node which is quite a hassle. i aspire to get to a point where "tagging" the user would get his contact information automatically assigned to the node.</p>
  
  <p><strong>im quite new to drupal, so i would very much appreciate any pointers \ google reading references on how to achieve these two goals.
  thanks a lot, i am looking forward for your answers as i got along quite nicely so far but now i got stuck.</strong></p>