web2py rest api endpoint gives invalid path output - api

Question

I have made a web2py web application. The api endpoints exposed are as follows.
"/comments[comments]"
"/comments/id/{comments.id}"
"/comments/id/{comments.id}/:field"
"/comments/user-id/{comments.user_id}"
"/comments/user-id/{comments.user_id}/:field"
"/comments/date-commented/{comments.date_commented.year}"
"/comments/date-commented/{comments.date_commented.year}/:field"
"/comments/date-commented/{comments.date_commented.year}/{comments.date_commented.month}"
"/comments/date-commented/{comments.date_commented.year}/{comments.date_commented.month}/:field"
"/comments/date-commented/{comments.date_commented.year}/{comments.date_commented.month}/{comments.date_commented.day}"
"/comments/date-commented/{comments.date_commented.year}/{comments.date_commented.month}/{comments.date_commented.day}/:field"
"/comments/date-commented/{comments.date_commented.year}/{comments.date_commented.month}/{comments.date_commented.day}/{comments.date_commented.hour}"
"/comments/date-commented/{comments.date_commented.year}/{comments.date_commented.month}/{comments.date_commented.day}/{comments.date_commented.hour}/:field"
"/comments/date-commented/{comments.date_commented.year}/{comments.date_commented.month}/{comments.date_commented.day}/{comments.date_commented.hour}/{comments.date_commented.minute}"
"/comments/date-commented/{comments.date_commented.year}/{comments.date_commented.month}/{comments.date_commented.day}/{comments.date_commented.hour}/{comments.date_commented.minute}/:field"
"/comments/date-commented/{comments.date_commented.year}/{comments.date_commented.month}/{comments.date_commented.day}/{comments.date_commented.hour}/{comments.date_commented.minute}/{comments.date_commented.second}"
"/comments/date-commented/{comments.date_commented.year}/{comments.date_commented.month}/{comments.date_commented.day}/{comments.date_commented.hour}/{comments.date_commented.minute}/{comments.date_commented.second}/:field"
"/comments/complaint-id/{comments.complaint_id}"
"/comments/complaint-id/{comments.complaint_id}/:field"
The comments model is as follows
models/db.py
db.define_table(
'comments',
Field('user_id', db.auth_user),
Field('comment_made', 'string', length=2048),
Field('date_commented', 'datetime', default=datetime.now),
Field('complaint_id', db.complaints),
Field('detailed_status', 'string', length=2048),
)
I have been successful in retriving a single comment via the following request
localhost:8000/api/comments/id/1.json
Now I wish to retrieve all the comments. I am not able to figure out how to use /comments[comments] to retrieve all comments.?
I have tried
localhost:8000/api/comments.json
But it gives an output with "invalid path"
I have realized requests such as http://localhost:8000/api/comments/complaint-id/1.json
also give "invalid path" as output.
Please help.
EDIT:
Controllers/default.py
#request.restful()
def api():
response.view='generic.' + request.extension
def GET(*args,**kargs):
patterns='auto'
parser = db.parse_as_rest(patterns,args,kargs)
if parser.status == 200:
return dict(content=parser.response)
else:
raise HTTP(parser.status,parser.error)
def POST(*args,**kargs):
return dict()
return locals()
routes.py in the main web2py folder to change the default application:
routers = dict(
BASE = dict(
default_application='GRS',
)
)
Another observation:
I added another endpoint as below:
def comm():
"""" Comments api substitute"""
rows=db().select(db.comments.ALL) ## this line shows error
# rows = db(db.comments.id > 0).select()
#rows=[[5,6],[3,4],[1,2]]
#for row in rows:
# print row.id
return dict(message=rows)
Even now I am not able to retrieve all comments with "/comm.json". This gives a web2py error ticket which says "need more than 1 value to unpack" on the line "rows=db.select(db.comments.ALL)". Are the above invalid path and this error related in someway?