On Wednesday, October 15, 2014 11:27:35 PM UTC-7, Joe wrote:
>
> This is what I am trying to do: I want the user to be able to select
> images, using a select button under each image.
>
> My plan to achieve this is:
>
> 1. define a table for all the images and define an other table for the
> images the user will select.
> 2. create a function with an SQLFORM to process this somehow so I will
> have a list of the selected images in the database
>
>
SQLFORM would be a tool to help you present images to the user and to get
his responses (which ones he was selecting). (You might be presenting a
set of thumbnails for the user to select which [full-size] images to do
some image processing on, for instance.)
My thoughts are that you would then do one of 3 things with the response,
depending on what worked for the next [image processing] step:
1) store the selections as a list in the session
2) store the selections by setting a field in your table that tracks the
images
3) store the selections as a "transaction table" that is just a small table
that mainly is a ref to the main table.
1 and 3 are similar in approach, but implemented differently. 1 would be
more suitable if you were immediately going on to begin processing the
selections,
and 3 would be helpful if the user was expecting to browse all the way
through the collection of images before beginning processing.
2 would work either way. In this case, you'd have just one table, the main
list:
db.define_table('images',
Field('thumb', ....),
Field('image', ...),
Field('selected', boolean),
Field('other_property, ...),
....)
I'd go on to say that which one works best depends on what the user is
trying to do with the images, so we would probably want more context before
choosing.
If you're just doing this a practice project, any of the 3 would be
appropriate, and I don't see much difference in difficulty to implement. I
am, however, saying that as someone who sometimes does web2py stuff to make
tools for my real job, and not as a guru.
Good luck!
/dps
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