To add more to this issue. I am able to select multiple facets from the same subsite, just not when I choose two facets from two different subsites in our multisite cross-domain search page. At this moment I am just using facets provided by categories for each page from each subsite. No custom taxonomies or anything else unusual, just a single main category and one sub category from the same site is what works.

I tried both, still produced same result.

When enabling the Query Monitor extension it produces this error message when attempting to select multiple facets:

Solr HTTP error: Bad Request (400) {“error”:{“metadata”:[“error-class”,”org.apache.solr.common.SolrException”,”root-error-class”,”org.apache.solr.common.SolrException”],”msg”:”Specify at least one field, function or query to group by.”,”code”:400}}

The page stops at the error and does not render the rest of the page, no Query Monitor available. Even the Query Monitor drop down at the top is broken, no drop down options. I can show you the query before that, but I am guessing that won’t help? I can provide the URL query string if that helps?

?wpsolr_q=student&wpsolr_sort=sort_by_relevancy_desc&wpsolr_fq%5B0%5D=categories%3AHospitality&wpsolr_fq%5B1%5D=categories%3ARoss%20IT

Is this where I should be looking for error log results?

https://www.wpsolr.com/forums/topic/unable-to-replace-the-default-wordpress-search-with-wpsolr-search/#post-11801

Here is the query through the debug.log file:

[15-Apr-2022 15:58:56 UTC] WPSOLR Log query =>
Url: “/search/?wpsolr_sort=sort_by_relevancy_desc&wpsolr_fq%5B0%5D=categories%3AFinancial%20Aid&wpsolr_fq%5B1%5D=categories%3AHospitality”
Index: “/opt/data/solr/rossweb”
Nb results shown: 0
Total nb results: 0
Speed: 927 ms
Query: {
“options”: {
“handler”: “select”,
“resultclass”: “Solarium\\QueryType\\Select\\Result\\Result”,
“documentclass”: “Solarium\\QueryType\\Select\\Result\\Document”,
“query”: “(*)”,
“start”: 0,
“rows”: 25,
“fields”: “*,score”,
“omitheader”: true,
“querydefaultoperator”: “AND”
},
“query”: “(*)”,
“highlighting”: [],
“sorts”: {
“date”: “desc”
},
“grouping”: {
“fields”: [],
“options”: {
“resultquerygroupclass”: “Solarium\\Component\\Result\\Grouping\\QueryGroup”,
“resultvaluegroupclass”: “Solarium\\Component\\Result\\Grouping\\ValueGroup”
}
},
“fields”: [
“id”,
“PID”,
“type”,
“meta_type_s”,
“title”,
“numcomments”,
“comments”,
“displaydate”,
“displaymodified”,
“*categories_str”,
“author”,
“*post_thumbnail_href_str”,
“*post_href_str”,
“snippet_s”
],
“facets”: {
“categories_str”: {
“type”: “field”,
“excludes”: [
“fct_excl_categories_str”
]
}
},
“filters”: {
“authorized indexed types”: {
“query”: “type:(\”wptb-tables\” OR \”post\” OR \”page\”)”,
“tags”: [
“fct_excl_type”
]
},
“bad_statuses”: {
“query”: “-post_status_s:(\”draft\” OR \”pending\” OR \”trash\” OR \”future\” OR \”private\” OR \”auto-draft\”)”,
“tags”: []
},
“categories_str:\”Financial Aid\””: {
“query”: “categories_str:\”Financial\\ Aid\””,
“tags”: [
“fct_excl_categories_str”
]
},
“categories_str:\”Hospitality\””: {
“query”: “categories_str:\”Hospitality\””,
“tags”: [
“fct_excl_categories_str”
]
},
“front-end exclusion 1”: {
“query”: “(*:* -is_excluded_s:[* TO *]) OR is_excluded_s:(n)”,
“tags”: []
}
}
}
Results: {
“response”: {
“numFound”: 0,
“start”: 0,
“docs”: []
},
“facet_counts”: {
“facet_queries”: [],
“facet_fields”: {
“categories_str”: [
“Department Information”,
5,
“Financial Aid”,
45,
“Hospitality”,
16,
“Ross IT”,
123
]
},
“facet_ranges”: [],
“facet_intervals”: [],
“facet_heatmaps”: []
}
}