Is it possible somehow to incorporate "this is a text" into a "blob/text"-value in the database when the row is created? It's not possible to do with a default value hence it's a "blob/text"-value.
At the moment I create the row for a user with:
@presentation = current_user.presentation @presentation = current_user.create_presentation unless @presentation
I tried to create this in my lib file string.rb to show something else if the value was nil...(and required the 'string.rb' in my application helper)
def or_empty(alternate) (self.nil? or self == "") ? alternate : self end
but that didn't work either.
You'd need to open the class up to do this.
class String def or_empty(alternate = 'default') self.blank? ? alternate : self end
That would work.
Julian.
Learn Ruby on Rails! CHECK OUT THE FREE VIDS (LIMITED TIME) VIDEO #3
OUT APRIL 6
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Julian Leviston wrote:
You'd need to open the class up to do this.
class String def or_empty(alternate = 'default') self.blank? ? alternate : self end
That would work.
Julian.
Learn Ruby on Rails! CHECK OUT THE FREE VIDS (LIMITED TIME) VIDEO #3 OUT APRIL 6 http://sensei.zenunit.com/
Nope, that doesn't do it,
I still get an error "The error occurred while evaluating nil.or_empty"
in this line of my show-view: <%= h @presentation.pres.or_empty("No presentation has been entered")%>
because the there exists nothing in the pres-field. This is what I'm trying to fix.
what do you mean with:
How about you do this in your model
def pres value_in_database = self[:pres] #do something with value_in_database end
Fred
Frederick Cheung wrote:
Frederick Cheung wrote:
because the there exists nothing in the pres-field. This is what I'm trying to fix.
How about you do this in your model
def pres value_in_database = self[:pres] #do something with value_in_database end
Fred
I'm not quite sure I completely understand... =/
Overwrite the accessor that rails provides, using self[:pres] to get
at the original value.
Fred
Frederick Cheung wrote: