Hi Dave,
Thanks so much for your help! I have been working on this and didn't get
too far. I am trying to understand the syntax and the logic so I can learn
how to do this and then apply it in an application I am working on just for
my self of course.
Here is where I am at the moment: I tried the Field('image' 'upload') but I
couldn't figure out how to handle the uploaded img file in the db after it
was uploaded. I was able to display the image but then I couldn't do much
more. I just don't have the knowledge.
Now I am trying to have the user select the image name instead of the
image, so I don't have to upload the images in the database, I can upload
the images in the static folder instead. This way I can have a list of
names for selected images and later I have to find a way the match the
names with the images then I will have what I need.
Now I am trying to do this:
db.define_table('images',
Field('picture_name'))
db.define_table('chosen',
Field('selected_pictures', 'boolean'))
I am trying have one db for the picture's name and one for the selected
picture names. It would be a big step forward (I think) if I can select the
picture_name from the images db and the picture_name would somehow end up
in the in the chosen db. Of course, I don't know how to do this and I don't
know if this is the best way to approach this.
This is where I am stuck:
def index():
form = SQLFORM(db.images).process()
return dict(form=form)
def pictures():
form = SQLFORM(db.chosen).process()
return dict(form=form)
I'd appreciate any help, thanks again.
On Saturday, October 18, 2014 2:01:44 AM UTC+8, Dave S wrote:
>
>
> 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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