How to implement Solr's facet.missing=true with Lucene

up vote
0
down vote

favorite

Solr supports returning the number of matching documents with no facet value for the field. How can the same be achieved with Lucene?

Example: I have 5 documents that may have values for the a field category

Document 1 has category=A

Document 2 has category=A and category=B

Document 3 has category=B and category=C

Document 4 and 5 have no category values

The code looks like

 var facetsCollector = new FacetsCollector();

 FacetsCollector.Search(_indexSearcher, new MatchAllDocsQuery(), 100, facetsCollector);

 var state = DefaultSortedSetDocValuesReaderState(_indexReader, "category_facet");

 var facets = SortedSetDocValuesFacetCounts(state, facetsCollector);

 var children = facets.GetTopChildren(100, "category_dim");

This gives me LabelValues

Label:A, Value:2

Label:B, Value:2

Label:C, Value:1

How can I determine "Label:(missing), Value:2"?

Running another query +*:* -category:* is an obvious option. However, can it be done in a smarter way?

asked Nov 19 at 12:19

Paul B.

1,7201839

add a comment |

up vote
0
down vote

favorite

Solr supports returning the number of matching documents with no facet value for the field. How can the same be achieved with Lucene?

Example: I have 5 documents that may have values for the a field category

Document 1 has category=A

Document 2 has category=A and category=B

Document 3 has category=B and category=C

Document 4 and 5 have no category values

The code looks like

 var facetsCollector = new FacetsCollector();

 FacetsCollector.Search(_indexSearcher, new MatchAllDocsQuery(), 100, facetsCollector);

 var state = DefaultSortedSetDocValuesReaderState(_indexReader, "category_facet");

 var facets = SortedSetDocValuesFacetCounts(state, facetsCollector);

 var children = facets.GetTopChildren(100, "category_dim");

This gives me LabelValues

Label:A, Value:2

Label:B, Value:2

Label:C, Value:1

How can I determine "Label:(missing), Value:2"?

Running another query +*:* -category:* is an obvious option. However, can it be done in a smarter way?

asked Nov 19 at 12:19

Paul B.

1,7201839

add a comment |

up vote
0
down vote

favorite

Solr supports returning the number of matching documents with no facet value for the field. How can the same be achieved with Lucene?

Example: I have 5 documents that may have values for the a field category

Document 1 has category=A

Document 2 has category=A and category=B

Document 3 has category=B and category=C

Document 4 and 5 have no category values

The code looks like

 var facetsCollector = new FacetsCollector();

 FacetsCollector.Search(_indexSearcher, new MatchAllDocsQuery(), 100, facetsCollector);

 var state = DefaultSortedSetDocValuesReaderState(_indexReader, "category_facet");

 var facets = SortedSetDocValuesFacetCounts(state, facetsCollector);

 var children = facets.GetTopChildren(100, "category_dim");

This gives me LabelValues

Label:A, Value:2

Label:B, Value:2

Label:C, Value:1

How can I determine "Label:(missing), Value:2"?

Running another query +*:* -category:* is an obvious option. However, can it be done in a smarter way?

asked Nov 19 at 12:19

Paul B.

1,7201839

Solr supports returning the number of matching documents with no facet value for the field. How can the same be achieved with Lucene?

Example: I have 5 documents that may have values for the a field category

Document 1 has category=A

Document 2 has category=A and category=B

Document 3 has category=B and category=C

Document 4 and 5 have no category values

The code looks like

 var facetsCollector = new FacetsCollector();

 FacetsCollector.Search(_indexSearcher, new MatchAllDocsQuery(), 100, facetsCollector);

 var state = DefaultSortedSetDocValuesReaderState(_indexReader, "category_facet");

 var facets = SortedSetDocValuesFacetCounts(state, facetsCollector);

 var children = facets.GetTopChildren(100, "category_dim");

This gives me LabelValues

Label:A, Value:2

Label:B, Value:2

Label:C, Value:1

How can I determine "Label:(missing), Value:2"?

Running another query +*:* -category:* is an obvious option. However, can it be done in a smarter way?

lucene facet

asked Nov 19 at 12:19

Paul B.

1,7201839

asked Nov 19 at 12:19

Paul B.

1,7201839

asked Nov 19 at 12:19

Paul B.

1,7201839

asked Nov 19 at 12:19

Paul B.

1,7201839

asked Nov 19 at 12:19

Paul B.

1,7201839

add a comment |

active

oldest

votes

Your Answer

StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");

StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});

function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});

}
});

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53374492%2fhow-to-implement-solrs-facet-missing-true-with-lucene%23new-answer', 'question_page');
}
);

Post as a guest

Name

Required, but never shown

active

oldest

votes

draft saved

draft discarded

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Sign up or log in

StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});

Post as a guest

Name

Required, but never shown

Name

Required, but never shown

Name

Required, but never shown

This page is only for reference, If you need detailed information, please check here

搜尋此網誌

Ytukyg