[web2py] Re: calling custom_store and custom_retrieve using parameters
Hello again,
What does the autodelete function use to locate files? I seem to have
broken mine.
Cheers,
-James
On Thursday, April 11, 2013 12:01:11 PM UTC+12, James Burke wrote:
Here's what I came up with. Perhaps not such a great solution, because it
pigeon holes my download function But it works =)
model/client.py
def store_file(file, filename=None, path=None, client_dir=None, sub_folder
=None):
if sub_folder == 'Workbench':
path = D:/DATA_EXTRACTS/%s/Scripts %(client_dir)
else:
path = D:/DATA_EXTRACTS/%s/Scripts/%s %(client_dir, sub_folder)
if not os.path.exists(path):
os.makedirs(path)
pathfilename = os.path.join(path, filename)
dest_file = open(pathfilename, 'wb')
try:
shutil.copyfileobj(file, dest_file)
finally:
dest_file.close()
filename = '%s/%s/%s' %(client_dir,sub_folder,filename)
return filename
def retrieve_file(filename, path=None):
file_path = filename.split('/')
if file_path[1] == 'Workbench':
path = D:/DATA_EXTRACTS/%s/Scripts %(file_path[0])
else:
path = D:/DATA_EXTRACTS/%s/Scripts/%s %(file_path[0], file_path[1])
filename = file_path[2]
return (filename, open(os.path.join(path, filename), 'rb'))
db.define_table('file',
Field('client', 'reference client'),
Field('type', requires=IS_IN_SET(['Clipper','Workbench', 'Terramatch',
'Supply']), default='Workbench'),
Field('file', type='upload',
custom_store=lambda file,filename,path: store_file(file, filename, path,
db.client(request.vars.client).client_dir_name if request.vars.client
else None,
request.vars.type if request.vars.type else None),
custom_retrieve=lambda filename, path: retrieve_file(filename, path)),
Field('sequence', 'integer', required=True),
Field('created_date', 'datetime', default=request.now,
readable=False,writable
=False),
Field('modified_date', 'datetime', update=request.now,
readable=False,writable
=False),
format='%(file)s')
controller/default.py
def download():
if not request.args:
raise HTTP(400)
name = %s/%s/%s %(request.args[0],request.args[1],request.args[2])
field = db[file][file]
try:
(filename, file) = field.retrieve(name)
except IOError:
raise HTTP(404)
response.headers[Content-Disposition] = attachment; filename=%s
%request
.args[-1]
stream = response.stream(file, chunk_size=64*1024, request=request)
raise HTTP(200, stream, **response.headers)
Solution modified from:
http://stackoverflow.com/questions/8008213/web2py-upload-with-original-filename/8185933#8185933
On Tuesday, April 9, 2013 11:47:59 PM UTC+12, Anthony wrote:
Another option -- when submitting a form, the value for db.file.client
should be in request.vars.client, so you could do:
custom_store=lambda file, filename, path: store_file(file, filename, path
,
db.client(request.vars.client).client_dir_name if request.vars.client
else None)
You will also need to fetch the client id in custom_retrieve, though that
will be trickier because it won't be in request.vars in that case. Instead,
I would recommend you include the custom directory name within the filename
created by custom_store -- so custom_store would create a filename like
table.field.folder.uuid_fragment.encoded_filename.ext. Then your
custom_retrieve function could simply extract the directory name from the
filename. In fact, in that case, you don't need an entire custom_retrieve
function -- instead, you can just implement a
custom_retrieve_file_properties function (see
https://code.google.com/p/web2py/source/browse/gluon/dal.py#9355 for
what that function is supposed to return). That way, when retrieving the
file, you don't need the client id, and you avoid an unnecessary database
query to get the directory name (which is already available in the
filename).
Anthony
On Monday, April 8, 2013 11:26:09 PM UTC-4, James Burke wrote:
Came up with a workaround.
def store_file(file, filename=None, path=None):
try:
client_id = int(request.args[2])
client_dir = db(db.client.id == client_id).select(db.client.
client_dir_name).first().client_dir_name
except:
client_dir = 'Default'
path = applications/init/uploads/%s % (client_dir)
if not os.path.exists(path):
os.makedirs(path)
pathfilename = os.path.join(path, filename)
dest_file = open(pathfilename, 'wb')
try:
shutil.copyfileobj(file, dest_file)
finally:
dest_file.close()
return filename
I'm using a smartgrid so the client id is passed as an argument when I
client on the files link.
On Tuesday, April 9, 2013 2:34:35 PM UTC+12, James Burke wrote:
Thanks for your swift response.
I kind of understand that, but how do you get the value rather than the
field name?
db.define_table('file',
Field('client', 'reference client'),
Field('type', requires=IS_IN_SET(['Clipper','Workbench', 'Terramatch',
'Supply']), default='Workbench'),
Field('file', type='upload',
[web2py] Re: calling custom_store and custom_retrieve using parameters
Another option -- when submitting a form, the value for db.file.client
should be in request.vars.client, so you could do:
custom_store=lambda file, filename, path: store_file(file, filename, path,
db.client(request.vars.client).client_dir_name if request.vars.client
else None)
You will also need to fetch the client id in custom_retrieve, though that
will be trickier because it won't be in request.vars in that case. Instead,
I would recommend you include the custom directory name within the filename
created by custom_store -- so custom_store would create a filename like
table.field.folder.uuid_fragment.encoded_filename.ext. Then your
custom_retrieve function could simply extract the directory name from the
filename. In fact, in that case, you don't need an entire custom_retrieve
function -- instead, you can just implement a
custom_retrieve_file_properties function (see
https://code.google.com/p/web2py/source/browse/gluon/dal.py#9355 for what
that function is supposed to return). That way, when retrieving the file,
you don't need the client id, and you avoid an unnecessary database query
to get the directory name (which is already available in the filename).
Anthony
On Monday, April 8, 2013 11:26:09 PM UTC-4, James Burke wrote:
Came up with a workaround.
def store_file(file, filename=None, path=None):
try:
client_id = int(request.args[2])
client_dir = db(db.client.id == client_id).select(db.client.
client_dir_name).first().client_dir_name
except:
client_dir = 'Default'
path = applications/init/uploads/%s % (client_dir)
if not os.path.exists(path):
os.makedirs(path)
pathfilename = os.path.join(path, filename)
dest_file = open(pathfilename, 'wb')
try:
shutil.copyfileobj(file, dest_file)
finally:
dest_file.close()
return filename
I'm using a smartgrid so the client id is passed as an argument when I
client on the files link.
On Tuesday, April 9, 2013 2:34:35 PM UTC+12, James Burke wrote:
Thanks for your swift response.
I kind of understand that, but how do you get the value rather than the
field name?
db.define_table('file',
Field('client', 'reference client'),
Field('type', requires=IS_IN_SET(['Clipper','Workbench', 'Terramatch',
'Supply']), default='Workbench'),
Field('file', type='upload',
custom_store=lambda file,filename,path: store_file(file, filename, path,db
.file.client._id),
custom_retrieve=lambda filename, path: retrieve_file(filename, path, db.
file.client)),
format='%(file)s')
I'm trying to retrieve the clients name and use it to generate the folder.
Cheers,
-James
On Tuesday, April 9, 2013 2:06:54 PM UTC+12, Anthony wrote:
The fourth argument passed to store_file() is db.table.new_filename,
which is a DAL Field object. Your code is treating it as a string, and
table.new_filename is the string representation of a Field object. If you
want to include an actual filename string, then that's what you have to
pass to the function.
Anthony
On Monday, April 8, 2013 9:34:45 PM UTC-4, James Burke wrote:
Hi Anthony,
I've tried the solution you've posted below:
Field('file', 'upload',
custom_store=lambda file, filename, path: store_file(file, filename
, path, db.table.new_filename),
...)
But when my additional parameter gets sent to store_file it sends
'table.new_filename'
def store_file(file, filename=None, path=None, new_filename=None):
path = applications/init/uploads/%s % (new_filename)
if not os.path.exists(path):
os.makedirs(path)
pathfilename = os.path.join(path, filename)
dest_file = open(pathfilename, 'wb')
try:
shutil.copyfileobj(file, dest_file)
finally:
dest_file.close()
return filename
Results in a new folder in uploads called 'table.new_filename'
Cheers
-James
On Wednesday, August 8, 2012 11:51:44 PM UTC+12, Anthony wrote:
On Wednesday, August 8, 2012 7:09:37 AM UTC-4, Jim Gregory wrote:
Can custom_store and custom_retrieve take parameters when they are
called using Field, e.g.:
db.define_table('table',
Field('file', 'upload', custom_store=store_file(file,
db.table.new_filename),
custom_retrieve=retrieve_file(db.table.new_filename))?
Field('new_filename','string')
)
These attributes have to be callables, so you can't call them
yourself. To pass additional custom arguments to a callable, just turn it
into a lambda that takes the standard arguments and pass the additional
arguments to your function within the lambda:
Field('file', 'upload',
custom_store=lambda file, filename, path: store_file(file,filename
, path, db.table.new_filename),
...)
When web2py calls the custom_store callable, it will pass three
arguments (file, filename, and path), so your lambda must take three
arguments. Within the lambda, you can then do whatever you want. You can
pass any or all of the standard three arguments to your custom function,
and you can pass additional arguments. In the example
[web2py] Re: calling custom_store and custom_retrieve using parameters
Thanks Anthony.
As it turned out I also needed to add db.file.type to my path so this
worked a treat.
I'll have a play with the retrieve function.
Cheers
On Tuesday, April 9, 2013 11:47:59 PM UTC+12, Anthony wrote:
Another option -- when submitting a form, the value for db.file.client
should be in request.vars.client, so you could do:
custom_store=lambda file, filename, path: store_file(file, filename, path,
db.client(request.vars.client).client_dir_name if request.vars.client
else None)
You will also need to fetch the client id in custom_retrieve, though that
will be trickier because it won't be in request.vars in that case. Instead,
I would recommend you include the custom directory name within the filename
created by custom_store -- so custom_store would create a filename like
table.field.folder.uuid_fragment.encoded_filename.ext. Then your
custom_retrieve function could simply extract the directory name from the
filename. In fact, in that case, you don't need an entire custom_retrieve
function -- instead, you can just implement a
custom_retrieve_file_properties function (see
https://code.google.com/p/web2py/source/browse/gluon/dal.py#9355 for what
that function is supposed to return). That way, when retrieving the file,
you don't need the client id, and you avoid an unnecessary database query
to get the directory name (which is already available in the filename).
Anthony
On Monday, April 8, 2013 11:26:09 PM UTC-4, James Burke wrote:
Came up with a workaround.
def store_file(file, filename=None, path=None):
try:
client_id = int(request.args[2])
client_dir = db(db.client.id == client_id).select(db.client.
client_dir_name).first().client_dir_name
except:
client_dir = 'Default'
path = applications/init/uploads/%s % (client_dir)
if not os.path.exists(path):
os.makedirs(path)
pathfilename = os.path.join(path, filename)
dest_file = open(pathfilename, 'wb')
try:
shutil.copyfileobj(file, dest_file)
finally:
dest_file.close()
return filename
I'm using a smartgrid so the client id is passed as an argument when I
client on the files link.
On Tuesday, April 9, 2013 2:34:35 PM UTC+12, James Burke wrote:
Thanks for your swift response.
I kind of understand that, but how do you get the value rather than the
field name?
db.define_table('file',
Field('client', 'reference client'),
Field('type', requires=IS_IN_SET(['Clipper','Workbench', 'Terramatch',
'Supply']), default='Workbench'),
Field('file', type='upload',
custom_store=lambda file,filename,path: store_file(file, filename, path
, db.file.client._id),
custom_retrieve=lambda filename, path: retrieve_file(filename, path, db
.file.client)),
format='%(file)s')
I'm trying to retrieve the clients name and use it to generate the
folder.
Cheers,
-James
On Tuesday, April 9, 2013 2:06:54 PM UTC+12, Anthony wrote:
The fourth argument passed to store_file() is db.table.new_filename,
which is a DAL Field object. Your code is treating it as a string, and
table.new_filename is the string representation of a Field object. If
you
want to include an actual filename string, then that's what you have to
pass to the function.
Anthony
On Monday, April 8, 2013 9:34:45 PM UTC-4, James Burke wrote:
Hi Anthony,
I've tried the solution you've posted below:
Field('file', 'upload',
custom_store=lambda file, filename, path: store_file(file,filename
, path, db.table.new_filename),
...)
But when my additional parameter gets sent to store_file it sends
'table.new_filename'
def store_file(file, filename=None, path=None, new_filename=None):
path = applications/init/uploads/%s % (new_filename)
if not os.path.exists(path):
os.makedirs(path)
pathfilename = os.path.join(path, filename)
dest_file = open(pathfilename, 'wb')
try:
shutil.copyfileobj(file, dest_file)
finally:
dest_file.close()
return filename
Results in a new folder in uploads called 'table.new_filename'
Cheers
-James
On Wednesday, August 8, 2012 11:51:44 PM UTC+12, Anthony wrote:
On Wednesday, August 8, 2012 7:09:37 AM UTC-4, Jim Gregory wrote:
Can custom_store and custom_retrieve take parameters when they are
called using Field, e.g.:
db.define_table('table',
Field('file', 'upload', custom_store=store_file(file,
db.table.new_filename),
custom_retrieve=retrieve_file(db.table.new_filename))?
Field('new_filename','string')
)
These attributes have to be callables, so you can't call them
yourself. To pass additional custom arguments to a callable, just turn
it
into a lambda that takes the standard arguments and pass the additional
arguments to your function within the lambda:
Field('file', 'upload',
custom_store=lambda file, filename, path: store_file(file,filename
, path, db.table.new_filename),
...)
When web2py calls the custom_store callable, it will pass three
arguments (file, filename,
[web2py] Re: calling custom_store and custom_retrieve using parameters
Hi Anthony,
I've tried the solution you've posted below:
Field('file', 'upload',
custom_store=lambda file, filename, path: store_file(file, filename,path
, db.table.new_filename),
...)
But when my additional parameter gets sent to store_file it sends
'table.new_filename'
def store_file(file, filename=None, path=None, new_filename=None):
path = applications/init/uploads/%s % (new_filename)
if not os.path.exists(path):
os.makedirs(path)
pathfilename = os.path.join(path, filename)
dest_file = open(pathfilename, 'wb')
try:
shutil.copyfileobj(file, dest_file)
finally:
dest_file.close()
return filename
Results in a new folder in uploads called 'table.new_filename'
Cheers
-James
On Wednesday, August 8, 2012 11:51:44 PM UTC+12, Anthony wrote:
On Wednesday, August 8, 2012 7:09:37 AM UTC-4, Jim Gregory wrote:
Can custom_store and custom_retrieve take parameters when they are called
using Field, e.g.:
db.define_table('table',
Field('file', 'upload', custom_store=store_file(file,
db.table.new_filename),
custom_retrieve=retrieve_file(db.table.new_filename))?
Field('new_filename','string')
)
These attributes have to be callables, so you can't call them yourself. To
pass additional custom arguments to a callable, just turn it into a lambda
that takes the standard arguments and pass the additional arguments to your
function within the lambda:
Field('file', 'upload',
custom_store=lambda file, filename, path: store_file(file, filename,path
, db.table.new_filename),
...)
When web2py calls the custom_store callable, it will pass three arguments
(file, filename, and path), so your lambda must take three arguments.
Within the lambda, you can then do whatever you want. You can pass any or
all of the standard three arguments to your custom function, and you can
pass additional arguments. In the example above, I passed the three
standard arguments followed by a fourth custom argument, though it doesn't
have to look like that (presumably you will at least want to pass the file
as an argument).
custom_retrieve takes two standard arguments, name and path.
Anthony
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[web2py] Re: calling custom_store and custom_retrieve using parameters
The fourth argument passed to store_file() is db.table.new_filename, which
is a DAL Field object. Your code is treating it as a string, and
table.new_filename is the string representation of a Field object. If you
want to include an actual filename string, then that's what you have to
pass to the function.
Anthony
On Monday, April 8, 2013 9:34:45 PM UTC-4, James Burke wrote:
Hi Anthony,
I've tried the solution you've posted below:
Field('file', 'upload',
custom_store=lambda file, filename, path: store_file(file, filename,path
, db.table.new_filename),
...)
But when my additional parameter gets sent to store_file it sends
'table.new_filename'
def store_file(file, filename=None, path=None, new_filename=None):
path = applications/init/uploads/%s % (new_filename)
if not os.path.exists(path):
os.makedirs(path)
pathfilename = os.path.join(path, filename)
dest_file = open(pathfilename, 'wb')
try:
shutil.copyfileobj(file, dest_file)
finally:
dest_file.close()
return filename
Results in a new folder in uploads called 'table.new_filename'
Cheers
-James
On Wednesday, August 8, 2012 11:51:44 PM UTC+12, Anthony wrote:
On Wednesday, August 8, 2012 7:09:37 AM UTC-4, Jim Gregory wrote:
Can custom_store and custom_retrieve take parameters when they are
called using Field, e.g.:
db.define_table('table',
Field('file', 'upload', custom_store=store_file(file,
db.table.new_filename),
custom_retrieve=retrieve_file(db.table.new_filename))?
Field('new_filename','string')
)
These attributes have to be callables, so you can't call them yourself.
To pass additional custom arguments to a callable, just turn it into a
lambda that takes the standard arguments and pass the additional arguments
to your function within the lambda:
Field('file', 'upload',
custom_store=lambda file, filename, path: store_file(file, filename,path
, db.table.new_filename),
...)
When web2py calls the custom_store callable, it will pass three arguments
(file, filename, and path), so your lambda must take three arguments.
Within the lambda, you can then do whatever you want. You can pass any or
all of the standard three arguments to your custom function, and you can
pass additional arguments. In the example above, I passed the three
standard arguments followed by a fourth custom argument, though it doesn't
have to look like that (presumably you will at least want to pass the file
as an argument).
custom_retrieve takes two standard arguments, name and path.
Anthony
--
---
You received this message because you are subscribed to the Google Groups
web2py-users group.
To unsubscribe from this group and stop receiving emails from it, send an email
to web2py+unsubscr...@googlegroups.com.
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[web2py] Re: calling custom_store and custom_retrieve using parameters
Thanks for your swift response.
I kind of understand that, but how do you get the value rather than the
field name?
db.define_table('file',
Field('client', 'reference client'),
Field('type', requires=IS_IN_SET(['Clipper','Workbench', 'Terramatch',
'Supply']), default='Workbench'),
Field('file', type='upload',
custom_store=lambda file,filename,path: store_file(file, filename, path, db
.file.client._id),
custom_retrieve=lambda filename, path: retrieve_file(filename, path, db.
file.client)),
format='%(file)s')
I'm trying to retrieve the clients name and use it to generate the folder.
Cheers,
-James
On Tuesday, April 9, 2013 2:06:54 PM UTC+12, Anthony wrote:
The fourth argument passed to store_file() is db.table.new_filename, which
is a DAL Field object. Your code is treating it as a string, and
table.new_filename is the string representation of a Field object. If you
want to include an actual filename string, then that's what you have to
pass to the function.
Anthony
On Monday, April 8, 2013 9:34:45 PM UTC-4, James Burke wrote:
Hi Anthony,
I've tried the solution you've posted below:
Field('file', 'upload',
custom_store=lambda file, filename, path: store_file(file, filename,path
, db.table.new_filename),
...)
But when my additional parameter gets sent to store_file it sends
'table.new_filename'
def store_file(file, filename=None, path=None, new_filename=None):
path = applications/init/uploads/%s % (new_filename)
if not os.path.exists(path):
os.makedirs(path)
pathfilename = os.path.join(path, filename)
dest_file = open(pathfilename, 'wb')
try:
shutil.copyfileobj(file, dest_file)
finally:
dest_file.close()
return filename
Results in a new folder in uploads called 'table.new_filename'
Cheers
-James
On Wednesday, August 8, 2012 11:51:44 PM UTC+12, Anthony wrote:
On Wednesday, August 8, 2012 7:09:37 AM UTC-4, Jim Gregory wrote:
Can custom_store and custom_retrieve take parameters when they are
called using Field, e.g.:
db.define_table('table',
Field('file', 'upload', custom_store=store_file(file,
db.table.new_filename),
custom_retrieve=retrieve_file(db.table.new_filename))?
Field('new_filename','string')
)
These attributes have to be callables, so you can't call them yourself.
To pass additional custom arguments to a callable, just turn it into a
lambda that takes the standard arguments and pass the additional arguments
to your function within the lambda:
Field('file', 'upload',
custom_store=lambda file, filename, path: store_file(file, filename,path
, db.table.new_filename),
...)
When web2py calls the custom_store callable, it will pass three
arguments (file, filename, and path), so your lambda must take three
arguments. Within the lambda, you can then do whatever you want. You can
pass any or all of the standard three arguments to your custom function,
and you can pass additional arguments. In the example above, I passed the
three standard arguments followed by a fourth custom argument, though it
doesn't have to look like that (presumably you will at least want to pass
the file as an argument).
custom_retrieve takes two standard arguments, name and path.
Anthony
--
---
You received this message because you are subscribed to the Google Groups
web2py-users group.
To unsubscribe from this group and stop receiving emails from it, send an email
to web2py+unsubscr...@googlegroups.com.
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[web2py] Re: calling custom_store and custom_retrieve using parameters
Came up with a workaround.
def store_file(file, filename=None, path=None):
try:
client_id = int(request.args[2])
client_dir = db(db.client.id == client_id).select(db.client.
client_dir_name).first().client_dir_name
except:
client_dir = 'Default'
path = applications/init/uploads/%s % (client_dir)
if not os.path.exists(path):
os.makedirs(path)
pathfilename = os.path.join(path, filename)
dest_file = open(pathfilename, 'wb')
try:
shutil.copyfileobj(file, dest_file)
finally:
dest_file.close()
return filename
I'm using a smartgrid so the client id is passed as an argument when I
client on the files link.
On Tuesday, April 9, 2013 2:34:35 PM UTC+12, James Burke wrote:
Thanks for your swift response.
I kind of understand that, but how do you get the value rather than the
field name?
db.define_table('file',
Field('client', 'reference client'),
Field('type', requires=IS_IN_SET(['Clipper','Workbench', 'Terramatch',
'Supply']), default='Workbench'),
Field('file', type='upload',
custom_store=lambda file,filename,path: store_file(file, filename, path,db
.file.client._id),
custom_retrieve=lambda filename, path: retrieve_file(filename, path, db.
file.client)),
format='%(file)s')
I'm trying to retrieve the clients name and use it to generate the folder.
Cheers,
-James
On Tuesday, April 9, 2013 2:06:54 PM UTC+12, Anthony wrote:
The fourth argument passed to store_file() is db.table.new_filename,
which is a DAL Field object. Your code is treating it as a string, and
table.new_filename is the string representation of a Field object. If you
want to include an actual filename string, then that's what you have to
pass to the function.
Anthony
On Monday, April 8, 2013 9:34:45 PM UTC-4, James Burke wrote:
Hi Anthony,
I've tried the solution you've posted below:
Field('file', 'upload',
custom_store=lambda file, filename, path: store_file(file, filename,path
, db.table.new_filename),
...)
But when my additional parameter gets sent to store_file it sends
'table.new_filename'
def store_file(file, filename=None, path=None, new_filename=None):
path = applications/init/uploads/%s % (new_filename)
if not os.path.exists(path):
os.makedirs(path)
pathfilename = os.path.join(path, filename)
dest_file = open(pathfilename, 'wb')
try:
shutil.copyfileobj(file, dest_file)
finally:
dest_file.close()
return filename
Results in a new folder in uploads called 'table.new_filename'
Cheers
-James
On Wednesday, August 8, 2012 11:51:44 PM UTC+12, Anthony wrote:
On Wednesday, August 8, 2012 7:09:37 AM UTC-4, Jim Gregory wrote:
Can custom_store and custom_retrieve take parameters when they are
called using Field, e.g.:
db.define_table('table',
Field('file', 'upload', custom_store=store_file(file,
db.table.new_filename),
custom_retrieve=retrieve_file(db.table.new_filename))?
Field('new_filename','string')
)
These attributes have to be callables, so you can't call them yourself.
To pass additional custom arguments to a callable, just turn it into a
lambda that takes the standard arguments and pass the additional arguments
to your function within the lambda:
Field('file', 'upload',
custom_store=lambda file, filename, path: store_file(file, filename
, path, db.table.new_filename),
...)
When web2py calls the custom_store callable, it will pass three
arguments (file, filename, and path), so your lambda must take three
arguments. Within the lambda, you can then do whatever you want. You can
pass any or all of the standard three arguments to your custom function,
and you can pass additional arguments. In the example above, I passed the
three standard arguments followed by a fourth custom argument, though it
doesn't have to look like that (presumably you will at least want to pass
the file as an argument).
custom_retrieve takes two standard arguments, name and path.
Anthony
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[web2py] Re: calling custom_store and custom_retrieve using parameters
Thanks, that is helpful. But the path does not seem to be passed in the
custom retrieve.
Field('file','upload',
uploadir='/path/to/folder', custom_store=lambda
file,filename,path:store_file(file,filename,path),
custom_retrieve=retrieve_file
On Wednesday, August 8, 2012 6:51:44 AM UTC-5, Anthony wrote:
On Wednesday, August 8, 2012 7:09:37 AM UTC-4, Jim Gregory wrote:
Can custom_store and custom_retrieve take parameters when they are called
using Field, e.g.:
db.define_table('table',
Field('file', 'upload', custom_store=store_file(file,
db.table.new_filename),
custom_retrieve=retrieve_file(db.table.new_filename))?
Field('new_filename','string')
)
These attributes have to be callables, so you can't call them yourself. To
pass additional custom arguments to a callable, just turn it into a lambda
that takes the standard arguments and pass the additional arguments to your
function within the lambda:
Field('file', 'upload',
custom_store=lambda file, filename, path: store_file(file, filename,path
, db.table.new_filename),
...)
When web2py calls the custom_store callable, it will pass three arguments
(file, filename, and path), so your lambda must take three arguments.
Within the lambda, you can then do whatever you want. You can pass any or
all of the standard three arguments to your custom function, and you can
pass additional arguments. In the example above, I passed the three
standard arguments followed by a fourth custom argument, though it doesn't
have to look like that (presumably you will at least want to pass the file
as an argument).
custom_retrieve takes two standard arguments, name and path.
Anthony
--
[web2py] Re: calling custom_store and custom_retrieve using parameters
On Wednesday, August 8, 2012 7:09:37 AM UTC-4, Jim Gregory wrote:
Can custom_store and custom_retrieve take parameters when they are called
using Field, e.g.:
db.define_table('table',
Field('file', 'upload', custom_store=store_file(file,
db.table.new_filename),
custom_retrieve=retrieve_file(db.table.new_filename))?
Field('new_filename','string')
)
These attributes have to be callables, so you can't call them yourself. To
pass additional custom arguments to a callable, just turn it into a lambda
that takes the standard arguments and pass the additional arguments to your
function within the lambda:
Field('file', 'upload',
custom_store=lambda file, filename, path: store_file(file, filename,path
, db.table.new_filename),
...)
When web2py calls the custom_store callable, it will pass three arguments
(file, filename, and path), so your lambda must take three arguments.
Within the lambda, you can then do whatever you want. You can pass any or
all of the standard three arguments to your custom function, and you can
pass additional arguments. In the example above, I passed the three
standard arguments followed by a fourth custom argument, though it doesn't
have to look like that (presumably you will at least want to pass the file
as an argument).
custom_retrieve takes two standard arguments, name and path.
Anthony
--
