Hi Munendra,
Let's see the 3 scenario:
1. Query without collapse
2. Query with collapse
3. Query with collapse and expand
I made a mini book database for this:
Case 1:
{ "responseHeader":{ "status":0, "QTime":0, "params":{ "q":"author:\"William
Shakespeare\"", "_":"1585603593269"}}, "response":{"numFound":4,"start":0,"
docs":[ { "id":"1", "author":"William Shakespeare", "title":"The Taming of
the Shrew", "format":"ebook", "_version_":1662625767773700096}, { "id":"2",
"author":"William Shakespeare", "title":"The Taming of the Shrew", "format":
"paper", "_version_":1662625790857052160}, { "id":"3", "author":"William
Shakespeare", "title":"The Taming of the Shrew", "format":"audiobook", "
_version_":1662625809553162240}, { "id":"4", "author":"William Shakespeare",
"title":"Much Ado about Nothing", "format":"paper", "_version_":
1662625868323749888}] }}
As you can see there are 3 different format from the same book.
Case 2:
{ "responseHeader":{ "status":0, "QTime":2, "params":{ "q":"author:\"William
Shakespeare\"", "fq":"{!collapse field=title}", "_":"1585603593269"}}, "
response":{"numFound":2,"start":0,"docs":[ { "id":"1", "author":"William
Shakespeare", "title":"The Taming of the Shrew", "format":"ebook", "
_version_":1662625767773700096}, { "id":"4", "author":"William Shakespeare",
"title":"Much Ado about Nothing", "format":"paper", "_version_":
1662625868323749888}] }}
Collapse post filter worked as I expected.
Case 3 let;s extend it with expand=true:
{ "responseHeader":{ "status":0, "QTime":1, "params":{ "q":"author:\"William
Shakespeare\"", "fq":"{!collapse field=title}&expand=true", "_":
"1585603593269"}}, "response":{"numFound":2,"start":0,"docs":[ { "id":"1", "
author":"William Shakespeare", "title":"The Taming of the Shrew", "format":
"ebook", "_version_":1662625767773700096}, { "id":"4", "author":"William
Shakespeare", "title":"Much Ado about Nothing", "format":"paper", "_version_
":1662625868323749888}] }}
As you can see nothing as changed. There is no additional section of the
response.
Cheers,
Roland
Munendra S N <sn.munendr...@gmail.com> ezt írta (időpont: 2020. márc. 30.,
H, 17:46):
> Please share the complete request. Also, does number of results change with
> & without collapse. Usually title would be unique every document. If that
> is the case then, there won't be anything to expand right?
>
> On Mon, Mar 30, 2020, 8:22 PM Szűcs Roland <szucs.rol...@bookandwalk.hu>
> wrote:
>
> > Hi Munendra,
> > I do not get error . The strange thing is that I get exactly the same
> > response with fq={!collapse field=title} versus fq={!collapse
> > field=title}&expand=true.
> > Collapse works properly as a standalone fq but expand has no impact. How
> > can I have access to the "hidden" documents then?
> >
> > Roland
> >
> > Munendra S N <sn.munendr...@gmail.com> ezt írta (időpont: 2020. márc.
> 30.,
> > H, 16:47):
> >
> > > Hey,
> > > Could you please share the stacktrace or error message you received?
> > >
> > > On Mon, Mar 30, 2020, 7:58 PM Szűcs Roland <
> szucs.rol...@bookandwalk.hu>
> > > wrote:
> > >
> > > > Hi All,
> > > >
> > > > I manage to use edismax queryparser in solr 8.4.1 with collapse
> without
> > > any
> > > > problem. I tested it with the SOLR admin GUI. So fq={!collapse
> > > field=title}
> > > > worked fine.
> > > >
> > > > As soon as I use the example from the documentation and use:
> > > fq={!collapse
> > > > field=title}&expand=true, I did not get back any additional output
> with
> > > > section expanded.
> > > >
> > > > Any idea?
> > > >
> > > > Thanks in advance,
> > > > Roland
> > > >
> > >
> >
>
