Evaluating Yesod and some issues with yesod-tableview.
For a week, in my free time, I want to evaluate Yesod. My plan is to rebuild in Yesod an application I have created with PHP. The application requires user authentication, access privileges for each user, forms and views for the data. Some forms should have repeated elements such as Persons Name1 Surname1 Age1 Name2 Surname2 Age2 ...... Namen Surnamen Agen My understanding is that Yesod can not handle this use case yet. If this is true I intend to include a hidden filed which will contain the values of the repeated elements in json format. Also, the respective form elements will have no name to prevent the browser from submitting their value. Before that, I need to to have a table which will list entries from a db table. The table should support pagination and filters. The filters will be in a form like: Filters: Name [An* ] Age between [12 ] [100] The values displayed in the table should be limited based on the values provided in the filters fields. I found a project in hackage, yesod-tableview. It doesn't compile. The error message I get is Yesod/TableView/NumEntriesForm.hs:28:19: Couldn't match expected type `text-0.11.0.8:Data.Text.Internal.Text' against inferred type `[Char]' Expected type: [(Int, text-0.11.0.8:Data.Text.Internal.Text)] Inferred type: [(Int, String)] In the first argument of `selectField', namely `numbers' In the expression: selectField numbers (fromString prompt) mdata I fixed the problem by removing the form which I don't needed anyway. I intend to do more modifications on the package. Namely, I'd like to make the package configurable on it's templates in order to produce json instead of html. This would permit integrating the functionality provided by the package with javascript grid components such as http://trirand.com/blog/jqgrid/jqgrid.html In order to develop the project I will have to deal with authentication, authorization, forms, persistent and widgets. I hope I will not wear your patience with my questions. Freely accessible examples that achieve parts of the intended functionality of the test application, would be very useful. Regards, Anakreontas Mentis
There is a pagination helper[1] that is maintained, although I personally
have not used it yet. The source code for haskellers.com is the largest,
most featureful site source code available [2] For the repeated form
elements you are trying to create multiple models at once? There is some
mass-input functionality available in the latest version of yesod-forms.
Since you are planning on asking lots of questions- please try to subject
tag your questions by component you are asking about (i.e. [Persistent]).
Also consider trying Stack Overflow or the Freenode #yesod channel for some
of your questions.
We always look forward to hearing about direct comparisons- those often end
up providing very useful feedback, and I don't know that anyone has done one
against PHP, although Blake Rain did start an application in PHP and happily
switched it to Yesod.
Greg Weber
[1]
http://pbrisbin.com/haskell/docs/html/yesod-goodies/Yesod-Goodies-Paginate.h...
[2] https://github.com/snoyberg/haskellers
On Tue, Jul 19, 2011 at 8:49 AM, Anakreon Mentis
For a week, in my free time, I want to evaluate Yesod.
My plan is to rebuild in Yesod an application I have created with PHP. The application requires user authentication, access privileges for each user, forms and views for the data. Some forms should have repeated elements such as Persons Name1 Surname1 Age1 Name2 Surname2 Age2 ...... Namen Surnamen Agen
My understanding is that Yesod can not handle this use case yet. If this is true I intend to include a hidden filed which will contain the values of the repeated elements in json format. Also, the respective form elements will have no name to prevent the browser from submitting their value.
Before that, I need to to have a table which will list entries from a db table. The table should support pagination and filters. The filters will be in a form like: Filters: Name [An* ] Age between [12 ] [100]
The values displayed in the table should be limited based on the values provided in the filters fields.
I found a project in hackage, yesod-tableview. It doesn't compile. The error message I get is Yesod/TableView/NumEntriesForm.hs:28:19: Couldn't match expected type `text-0.11.0.8:Data.Text.Internal.Text' against inferred type `[Char]' Expected type: [(Int, text-0.11.0.8:Data.Text.Internal.Text)] Inferred type: [(Int, String)] In the first argument of `selectField', namely `numbers' In the expression: selectField numbers (fromString prompt) mdata
I fixed the problem by removing the form which I don't needed anyway. I intend to do more modifications on the package. Namely, I'd like to make the package configurable on it's templates in order to produce json instead of html. This would permit integrating the functionality provided by the package with javascript grid components such as http://trirand.com/blog/jqgrid/jqgrid.html
In order to develop the project I will have to deal with authentication, authorization, forms, persistent and widgets. I hope I will not wear your patience with my questions. Freely accessible examples that achieve parts of the intended functionality of the test application, would be very useful.
Regards, Anakreontas Mentis
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participants (2)
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Anakreon Mentis -
Greg Weber