I think there is some confusion about how Widgets are used for Yesod Forms.
Yesod Forms (I'll just use capital 'F' when I mean a "Yesod Form")
hare pretty fancy. Some might say... TOO fancy. They take care of a
lot of things:
1. Defining the Haskell data that comes out of them
2. Defining what the body of the <form> looks like
3. Defining how to validate the data they should accept
One thing they explicitly do NOT do is generate a <form>. That's
because they are used in a lot of different ways (because of how
fancy they are).
If a web designer wants to include a Form in a template, they must
write it like this:
<form enctype=#{enctype} method=... action=...>
^{formFooBar}
In other words, they have to explicitly include a <form> element.
Conversely, someone creating a custom Form should NOT add a <form>
element to the Form's Widget.
In the example code above, "formFooBar" is a Widget that comes from
the Form. Note that like all Widgets, it is created in Haskell-land.
Perhaps some day it can be generated automatically based on its name,
but for now it is not, and a Haskeller has to provide it to the web
designer. (Of course, the Haskeller and the web designer could be the
same person...)
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