def update_prep_template(self, study, user, callback):
"""Update a prep template from the POST method
Parameters
----------
study : Study
The current study object
user : User
The current user object
callback : function
The callback function to call with the results once the processing
is done
Raises
------
HTTPError
If the prep template file does not exists
"""
# If we are on this function, the arguments "prep_template_id",
# "update_prep_template_file" must defined. If not, let tornado
# raise its error
pt_id = int(self.get_argument('prep_template_id'))
prep_template = self.get_argument('update_prep_template_file')
# Define here the message and message level in case of success
msg = "The prep template '%s' has been updated" % prep_template
msg_level = "success"
# Get the uploads folder
_, base_fp = get_mountpoint("uploads")[0]
# Get the path of the prep template in the uploads folder
fp = join(base_fp, str(study.id), prep_template)
if not exists(fp):
# The file does not exist, fail nicely
# Using 400 because we want the user to get the error in the GUI
raise HTTPError(400, "This file doesn't exist: %s" % fp)
try:
with warnings.catch_warnings(record=True) as warns:
pt = PrepTemplate(pt_id)
pt.update(load_template_to_dataframe(fp))
remove(fp)
# join all the warning messages into one. Note that this info
# will be ignored if an exception is raised
if warns:
msg = '; '.join([str(w.message) for w in warns])
msg_level = 'warning'
except (TypeError, QiitaDBColumnError, QiitaDBExecutionError,
QiitaDBDuplicateError, IOError, ValueError, KeyError,
CParserError, QiitaDBDuplicateHeaderError, QiitaDBError) as e:
# Some error occurred while processing the sample template
# Show the error to the user so they can fix the template
msg = html_error_message % ('updating the prep template:',
basename(fp), str(e))
msg = convert_text_html(msg)
msg_level = "danger"
callback((msg, msg_level, 'prep_template_tab', pt_id, None))
