does anyone have any examples of using jqGrid with twisted / python
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27-04-2021 - |
Question
I am looking to have a very simple grid and i want to use jqGrid with twisted web server returning all of the json. I have a number of examples of jqGrid code but wanted to see if there was any examples of the backend in python / twisted ?
Solution
First define your grid somewhere (e.g., grids.py). Only a model or queryset and a url are required.
class ExampleGrid(JqGrid):
model = SomeFancyModel # could also be a queryset
fields = ['id', 'name', 'desc'] # optional
url = reverse('grid_handler')
caption = 'My First Grid' # optional
colmodel_overrides = {
'id': { 'editable': False, 'width':10 },
}
Create views to handle requests
def grid_handler(request):
# handles pagination, sorting and searching
grid = ExampleGrid()
return HttpResponse(grid.get_json(request), mimetype="application/json")
def grid_config(request):
# build a config suitable to pass to jqgrid constructor
grid = ExampleGrid()
return HttpResponse(grid.get_config(), mimetype="application/json")
Define URLs for those views
from myapp.views import grid_handler, grid_config
...
url(r'^examplegrid/$', grid_handler, name='grid_handler'),
url(r'^examplegrid/cfg/$', grid_config, name='grid_config'),
got this example straight from here which is using django. you will need to build the functions which returns your json based on the data.
maybe something like:
def get_rows():
db.things.category.represent = lambda v: v.name
fields = ['id','name','category','price','owner']
rows = []
page = int(request.vars.page)
pagesize = int(request.vars.rows)
limitby = (page * pagesize - pagesize,page * pagesize)
orderby = db.things[request.vars.sidx]
if request.vars.sord == 'desc': orderby = ~orderby
for r in db(db.things.id>0).select(limitby=limitby,orderby=orderby):
vals = []
for f in fields:
rep = db.things[f].represent
if rep:
vals.append(rep(r[f]))
else:
vals.append(r[f])
rows.append(dict(id=r.id,cell=vals))
total = db(db.things.id>0).count()
pages = int(total/pagesize)
#if total % pagesize == 0: pages -= 1
data = dict(total=pages,page=page,rows=rows)
return data
which is from here
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