I have a form with some text_field and some drop down lists.
<input id="student_fname" name="student[fname]"
size="20" value=""
type="text">
<input id="student_mname" name="student[mname]"
size="20" value=""
type="text">
<input id="student_lname" name="student[lname]"
size="20" value=""
type="text">
Program:</dt><dd><select id="student_program_id"
name="student[program_id]">
<%= options_from_collection_for_select @programs, "id",
"prg_name",
@student.program_id %>
</select>
I am not able to use validates_presence_of in the model whenever I am
including this options_from_collection_for_select list. If I remove that
it checks for the presence of the field. Otherwise, it gives me the
following error
You have a nil object when you didn''t expect it!
You might have expected an instance of Array.
The error occured while evaluating nil.inject
Extracted source (around line #18):
17: <dt>Program:</dt><dd><select
id="student_program_id"
name="student[program_id]">
18: <%= options_from_collection_for_select @programs, "id",
"prg_name", @student.program_id %>
19: </select>
20:
21: </dl>
What is the reason for this?
Any help appreciated.
Thanks
Silvy Mathews
