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Questions tagged [deform]

Deform is a Python HTML form generation library. It runs under Python 2.x, 3.x, and PyPy and PyPy3. Forms are built with Colander schemas, uses Peppercorn for de/serialization, and Chameleon for templating.

Deform is a Python HTML form generation library. It runs under Python 2.x, 3.x, and PyPy and PyPy3. It is one of several web-related projects under the Pylons Project.

A demonstration of Deform is hosted by the Pylons Project.

Deform uses Colander as a schema library, Peppercorn as a form control deserialization library, and Chameleon (see ) to perform HTML templating.

Deform depends only on Peppercorn, Colander, Chameleon, and an internationalization library named translationstring, so it may be used in most web frameworks (or antiframeworks) as a result.

Alternate templating languages may be used, as long as all templates are translated from the native Chameleon templates to your templating system of choice and a suitable renderer is supplied to Deform.

72 questions
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How to make file upload facultative with Deform and Colander?

I would like to render a form containing a sequence of files, representing different images of a product. Providing files should be facultative, so the form should validate even in the absence of files. How can I do this ? Here is the colander…
ascobol
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Deform/Colander validator that has access to all nodes?

How do you define a custom validator in Deform/Colander that has access to all node values. I need to access the values from two fields in order to decide if a particular value is valid or not?
user2665694
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using query string in Python Pyramid route configuration

this is very specific to what I am trying to do so I start describing what it is: a Pyramid app serving plots like http://localhost:6543/path/to/myplot/plot001.png if the plot is not available another image is served (work.png) another part is the…
moin moin
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deform File Upload overrides my error message with Invalid pstruct: not a FieldStorage instance

If I do not select a file and just click 'submit', I get the following error:- Invalid pstruct: {'upload': "b'' is not a FieldStorage instance"} This is not the behavior I get on the deform demo site where leaving it empty results in the more…
Ng Oon-Ee
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Allow raw HTML in Deform form description fields

How would you stop Deform from escaping HTML in field titles or descriptions when rendering? My current best solution is to search/replace the returned rendered HTML string with what I need. Deform by default will escape all HTML characters to HTML…
Oli
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Working with Many to Many Relationships in Deform/Colander HTML Select Field

I'm working in the Pyramid framework and using the Deform package to render HTML forms given a colander scheme. I'm struggling to get my head wrapped around how to handle a schema with a many to many relationship. For example, my sqlalchemy models…
dhildreth
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Report form post-process error messages in HTML controls with Deform

Deform allows to add validation on different fields of a form. However, it checks that the form is valid in itself but that does not necessarily mean that the form processing will be valid. For example, if the form is for creating a new user with an…
user1919510
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Is there a way to make a deform/colander form field read-only/disabled?

I'm trying to use deform as part of pyramid and have no trouble getting fully editable or fully read-only forms, but I can't seem to find a way of creating a read-only text input field. The following code does not do what I want, but I think you…
d0nut
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Deform 2.0: Adding HTML5 placeholder

I am trying to add HTML5 placeholder attribute to Deform 2.0 TextInputWidget. However I am not sure if this should be supported or how this should be supported as documentation is not very clear about this - there seems to be some mask_placeholder…
Mikko Ohtamaa
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Sharing objects between view and application with Pyramid

I'm trying to create a web interface for a data analysis pipeline using Pyramid. I'm using deform and colander to make the forms. I've been adapting this example: http://pyramid-tutorials.readthedocs.org/en/latest/humans/security/step02/ Most of the…
ate50eggs
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How do you place a Bokeh chart within a Chameleon template?

I have a project with many scripts using Matplotlib. I'd like to build a web interface for this project. How do you place a Bokeh chart within a Chameleon template? I'm using Pyramid and the Deform bootstrap if that matters. Does anyone have a…
EnergyGeek
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Which one is the correct approach for form validation ? Colander's Schema validation or Deform's form validation?

I have just started using Pyramid for one of my projects and I have a case where in I need to validate a form field input, by taking that form field value and making a web-service call to assert the value's correctness. Like for example there is a…
Nanda Kishore
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How to custom the deform Form?

When I use the default deform Form. It's not what I need. How to custom it ? For example, I need this: firstname:[_______] lastname:[_______] *username: [____________________] alink where [__] represent normal html input. Should rewrite the…
Alex Chan
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How to do simple value check with error message in Deform/Colander

I'm implementing a simple 'tick to agree to terms and conditions box' in Deform/Colander. So, I simply want to check that the box is checked and have an error message saying 'You must agree to T&C'. I understand that I can…
somewhatoff
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Is there a way to map data from form to insert in to database without explicitly defining each variable?

I have made a really long form with the help of colander alchemy and deform. This form has 100 or so fields and currently the only way I know to add the data back to the database once form is submitted is to explicitly re-define each variable and…
Sarach Griffin
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