First, three corrections:
- The upload field does not name the stored file the same as the name of
the uploaded file. The stored file gets renamed, with the new name
including an encoded version of the original filename (which gets decoded
upon retrieveal). It is this new filename that actually gets stored in the
upload field (the file itself is stored on the filesystem).
- The attribute after a table name is a field name, not the name of an
uploaded file, so you would do db.image.file (db.image.water makes no
sense, as the table does not include a field named "water").
- The URL argument passed to the download function to indicate which
file to download must be the filename stored in the upload field, not a
Field object.
So, to display a given image, you must somehow be able to query the
database to retrieve the image you want, and then access the "file" field
of that record to get the filename, which you will then pass as a URL arg
to the download function. For example:
In a controller:
row = db(db.image.title == 'some title').select().first()
In the view:
<img src="{{=URL('default', 'download', args=row.file)}}
Anthony
On Sunday, July 26, 2015 at 12:41:06 AM UTC-4, michael sun wrote:
>
> I build a table:
>
> db.define_table('image',
> Field('title', unique=True),
> Field('file', 'upload'),
> format = '%(title)s')
>
> then upload a image called 'water'.
>
> in index.html, I wrote:
> <img src="{{=URL('download',args=db.image.water)}}" />
>
> but then it gives me the error:
>
> <type 'exceptions.AttributeError'>()
> Function argument list
>
> (self=<Table image (id,title,file)>, key='water')
> Code listing
>
> 343.
> 344.
> 345.
> 346.
> 347.
> 348.
>
> 349.
> 350.
> 351.
> 352.
>
>
> def __getattr__(self, key):
> try:
> return self.__dict__.__getitem__(str(key))
> except:
> raise AttributeError
>
>
> def __setitem__(self, key, value):
> self.__dict__.__setitem__(key, value)
>
>
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