THis will be a very useful recipe to share...
On Tue, Jan 8, 2013 at 2:26 AM, Ignacio Huerta <[email protected]> wrote:
> Hi Drew,
>
> El 08/01/13 06:55, Drew Hamilton escribió:
>
> Hello all,
>>
>> Thank you for all your suggestions. I know it's been a while but I was
>> on a road/sea trip for several weeks without reliable access to the
>> Internet, so I would just work for a while, get stuck, and then wait
>> until I next had Internet to look up what the problem was so I could
>> keep going.
>>
>> Here is where I am at, and it's led to more questions:
>>
>> 1. I have a "data uploads" model that contains the uploaded file itself.
>>
>> 2. Each data_upload has_many "import rows"; the import rows table is
>> just a "square" table of text that the Excel file gets parsed into.
>>
>> 3. There is a lifecycle action on the data uploads table that takes
>> "uploaded" rows and turns them into "parsed" rows -- that essentially
>> makes several "import rows" based on the uploaded data.
>>
>> 4. My "real" model (not the Import stuff) has computer manufacturers and
>> model numbers. Each table also has an "aliases" table ("HP", "Compaq",
>> "HP/Compaq" are all aliases for "Hewlett Packard", for example). I made
>> methods on the models that would look up records "by name or alias".
>>
>> 5. Another lifecycle action on the data uploads table turns "parsed"
>> rows into "imported" ones, by checking for the existence of
>> manufacturers or models, and creating them if they do not exist yet.
>>
>> Now I have more questions:
>>
>> 1. Is there any way to programatically "back out of" changing states in
>> a lifecycle, if something goes wrong along the way? Or having a single
>> action decide halfway which of two possible states that should be the
>> result. During development I am just changing things back directly in
>> the database, but it seems like the state gets changed at the beginning
>> of the action.
>>
>
> I'm not sure how to do this in the model, but I guess you could use
> something like this in the controller:
>
> def do_my_transition
> invoice = Invoice.find(params[:id])
> if (... some conditions ...)
> do_transition_action :my_transition
> else
> flash[:error] = "There has been an error"
> redirect_to(:action => 'show')
> end
> end
>
>
>
>
>> 2. Each manufacturer has_many manufacturer_aliases and also has_many
>> models. manufacturer_aliases and models both have create auto_action
>> for manufacturers, but only one of them works. Which one works depends
>> on which one is the first "children" of manufacturer. Is this expected
>> behaviour?
>>
>
> Yes, I think so. The automatic generator that creates
> app/views/taglibs/auto/pages.**dryml only prepares the form for the first
> one. But you should be able to add another form in show.dryml. Just take a
> look at the automatic page and see if you can reuse that. Ask if you get
> stuck :).
>
>
>
>> 3. Is there any way to interact with the user in the middle of the
>> lifecycle action? Rather than just blindly creating new entries for
>> things that it comes across and can't find, I'd like to ask whether it's
>> a new manufacturer or an alias of an existing one.
>>
>
> I'm not sure how your code looks like now, but I'm pretty sure you can do
> this in the model or controller levels. If you don't see how, please post
> the code that created the new records during the transition.
>
> Regards,
> Ignacio
>
>
>
>
>> Thanks,
>>
>> - Drew
>>
>> On Wednesday, November 21, 2012 9:57:59 PM UTC+9, Drew Hamilton wrote:
>>
>> Hi all,
>>
>> First off, a very quick introduction of where I'm coming from,
>> skill-level-wise: I'm a complete neophyte with both Rails and Hobo,
>> although I'm familiar with Ruby. I do understand web development,
>> MVC architecture, OOP, etc., and have used a variety of platforms
>> and frameworks.
>>
>> My company needs a small internal database to keep track of
>> contracts, and I'm using that as an opportunity to learn Rails. I
>> was attracted to Hobo because it seems like it will eliminate a lot
>> of the "busy work" involved in making an application.
>>
>> I did the Agility tutorial, and also followed along with my own
>> application. Indeed, I was amazed at how I needed to do little more
>> than declare my model to have a full application up and running. I
>> also did some work at changing some of the cards for my application,
>> just to show that I can, although I prefer not to do a whole lot of
>> that until the application is more complete than it is.
>>
>> Where I'm stuck now is that after the tutorial, I have an app that
>> allows users to enter and view data, but I don't have a really good
>> understanding of how to make it do things programmatically.
>>
>> In my specific case, the contract data in my application really only
>> needs to be *viewed*; the data itself should be uploaded once per
>> month from a CSV file and then cleaned up, have the uploader
>> notified of problem rows, etc. I used Paperclip and made a model
>> that would take the raw CSV files, and I also made a model to hold
>> the actual data from the files.
>>
>> Parsing the CSV isn't the problem; I'm sure there are many Ruby
>> libraries that can help. What I don't know is
>>
>> - If I wanted to make a link in the "uploaded csv file" page that,
>> when clicked would run code, how do I make that link? And where
>> does the code itself go?
>> - How do I access the data (not the CSV file; I mean how do I make
>> new records; how do I search existing records, etc.) from that code?
>>
>> I'm certainly not asking anyone to do my work for me; just hoping
>> that someone could give me a link that I can read, or a link to a
>> hobo-based project with public source code, etc. that would help
>> point me in the right direction.
>>
>> Thanks!
>>
>> - Drew
>>
>>
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>>
>
> --
> Ignacio Huerta Arteche
> http://www.ihuerta.net
> Teléfono: 0034 645 70 77 35
> Email realizado con software libre
>
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>
--
-Owen
*
Owen Dall
Vice President | Chief Technology Officer
Barquin International
www.barquin.com
Office: 202.296.7147 | Mobile: tel:410.991.0811
Fax: 202.296.8903 | email: [email protected]
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