Thursday, May 21, 2015
I am new to ruby on rails . I am trying to upload the data to any model , through file. so they specify the model name , and the data which needs to be dumped in to database . i am parsing each line of the file and trying to add the records . I am facing problem adding the has_many relations columns,
-- I am getting the column_names through model name. and data from the file. I need to add a record to database.
I will be helpful if you can suggest any better ways of doing this.
Thanks
kranthi
On Thursday, 21 May 2015 20:16:49 UTC+5:30, Colin Law wrote:
On Thursday, 21 May 2015 20:16:49 UTC+5:30, Colin Law wrote:
On 21 May 2015 at 13:48, kranthi kumar <kranth...@gmail.com> wrote:
> I know that we can add records like
>
> record.posts << Post.find(1);
>
> but how can add the same Post.find(1) record if I have a variable that
> contains the name "posts"
>
> I have something like this
>
> column_name = "posts"
>
> record[column_name] << Post.find(1);
>
> it is throwing an error
The ruby method send can be used to call a method by name, so for
normal methods one would do
record.send(column_name) << Post.find(1)
I think that aught to work for an ActiveRecord relation but never tried it.
However when I see code like that it often meens that there is some
smelly code about. Are you sure you really want to do what you are
attempting? There may well be a better way.
Colin
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