7stud -- wrote:
> 7stud -- wrote:
>>
>> Link.create("url" => params[:url])
>>
>> (that assumes the links table has only one field: url)
>>
>> Apparently when you assign a Link object to the variable @link, rails
>> will create a record in the database corresponding to the values in the
>> Link object. If you look at the create method in the file
>> LinksController.rb, that is what the create method does. This is what I
>> came up with:
>>
>> @link = Link.create("url" => params[:url])
>>
>
> After some more testing, I discovered that you don't have to assign the
> Link object to @link. I think that when you create a Model object(e.g.
> a Link object) and the Model is hooked up to a database, then as soon as
> you create the object, rails inserts a record corresponding to that
> object in the table.
That isn't quite right either. You have to save an object for rails to
enter it into a table:
mylink = Link.new
mylink.url = "www.somepage.com"
mylink.save
However, rails provides a convenience method, create(), that both
instantiates a new object and inserts a record into the table. create()
takes a hash of name/value pairs as an argument, where each name is a
field in the table.
(Or, you can pass create() an array of hashes, where each hash
represents one record, and create() will insert multiple records at the
same time.)
--
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