http://www.quora.com/Anthony-BastardiHi All,
I've used a SQLFORM.grid for displaying table content. I've provided
export to CSV option in grid.
My app settings are as below:
*models/db.py*
db.define_table('company',
Field('name', 'string', length=128, notnull=True,
unique=True),
Field('address', 'string'), format='%(name)s')
db.define_table('document',
Field('name', 'string', length=128, notnull=True),
Field('type', 'string', notnull=True),
Field('company', db.company, format='%(name)s')
Here,
document table has company as a reference key,
*Exported CSV should contain the company names not ids*
So I've defined a class *CSVExporter* according to anthony
<http://www.quora.com/Anthony-Bastardi> solution for
web2pygrid-csv-exports-shows-ids-not-values-for-reference-fields
<http://stackoverflow.com/questions/17337290/web2pygrid-csv-exports-shows-ids-not-values-for-reference-fields>
*modules/doc_utils.py*
from cStringIO import StringIO
class CSVExporter(object):
"""This class is used when grid's table contains reference key id.
Exported CSV should contain reference key name of reference
key not ids"""
file_ext = "csv"
content_type = "text/csv"
def __init__(self, rows):
self.rows = rows
def export(self):
if self.rows:
s = StringIO()
self.rows.export_to_csv_file(s, represent=True)
return s.getvalue()
else:
return ''
*#Grid uses Custom search for string*
def search_query(fields, keywords):
"""" Custom search for doc grid"""
if isinstance(keywords, (tuple, list)):
keywords = keywords[0]
request.vars.keywords = keywords
key = keywords.strip()
if key and not '"' in key and not "'" in key and key:
SEARCHABLE_TYPES = ('string', 'text', 'list:string')
words = key.split(' ') if key else []
filters = []
for field in fields:
#apply search on company_name also
if field.name == "portfolio_company":
#get db from current module
db = current.db
#get company name from record
company_ids = [company.id for company in db(
db.company.name.contains(words)).select(db.company.id)]
if company_ids:
filters.append(field.belongs(company_ids))
continue
if field.type in SEARCHABLE_TYPES:
all_words_filters = []
for word in words:
all_words_filters.append(field.contains(word))
filters.append(reduce(lambda a, b: (a & b),
all_words_filters))
parts = filters
else:
parts = None
if parts:
return reduce(lambda a, b: a | b, parts)
else:
return None
*controllers/documents.py*
from applications.asdf.doc_utils import CSVExporter, search_query
def docs():
export_csv = False
export_classes = None
query = valid_db_query_here
if auth.has_membership('manager'):
export_csv = True
export_classes = dict(csv=(CSVExporter, 'CSV'), xml=False,
html=False,
json=False,
csv_with_hidden_cols=False,
tsv=False,
tsv_with_hidden_cols=False)
grid = SQLFORM.grid(query, orderby=~db.document.created_on,
showbuttontext=False,
csv=export_csv, deletable=False,
searchable=search_query,
exportclasses=export_classes)
return (grid=grid)
If I search single keyword like Google or MicroSoft in then export works as
expected.
if I search multiple keywords like Google India Private Limited or Redhat
India Pvt Ltd then it shows expected rows in grid
But If I click on export button then it gives me *Following error*
*Ticket ID*
*127.0.0.1.2015-01-14.21-56-57.34fb2b60-2857-4c1a-9626-a854630fc9c7*
*<type 'exceptions.AttributeError'> 'list' object has no attribute
'colnames'*
*Version*
*web2py™ Version 2.9.5-stable+timestamp.2014.03.16.02.35.39*
*Traceback*
*1.*
*2.*
*3.*
*4.*
*5.*
*6.*
*7.*
*8.*
*9.*
*10.*
*11.*
*12.*
*13.*
*14.*
*15.*
*16.*
*Traceback (most recent call last):*
* File "/home/prasad/Rootpy/web2py_2.9/gluon/restricted.py", line 220, in
restricted*
* exec ccode in environment*
* File
"/home/prasad/Rootpy/web2py_2.9/applications/asdf/controllers/documents.py",
line 137, in <module>*
* File "/home/prasad/Rootpy/web2py_2.9/gluon/globals.py", line 385, in
<lambda>*
* self._caller = lambda f: f()*
* File "/home/prasad/Rootpy/web2py_2.9/gluon/tools.py", line 3287, in f*
* return action(*a, **b)*
* File "/home/prasad/Rootpy/web2py_2.9/gluon/tools.py", line 3287, in f*
* return action(*a, **b)*
* File
"/home/prasad/Rootpy/web2py_2.9/applications/asdf/controllers/documents.py",
line 112, in upload*
* exportclasses=export_classes)*
* File "/home/prasad/Rootpy/web2py_2.9/gluon/sqlhtml.py", line 2221, in
grid*
* rows.colnames = expcolumns # expcolumns is all cols to be exported
including virtual fields*
*AttributeError: 'list' object has no attribute 'colnames'*
I've started debugging and got following the point.
*For single keyword search,* the rows object has *<class 'gluon.dal.Rows'>
*type
and it contains exact rows which query gives
But the rows object has *list type for multiple search keywords*
Any clues/hints/suggestions for debugging this error?
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