Is it possible to control the order of operations when using multiple terms?
For example,
Lucene.Net.Search.TermQuery tq1 = new Lucene.Net.Search.TermQuery(new Lucene.Net.Index.Term("location", "seattle"));
Lucene.Net.Search.TermQuery tq2 = new Lucene.Net.Search.TermQuery(new Lucene.Net.Index.Term("location", "portland"));
Lucene.Net.Search.TermQuery tq3 = new Lucene.Net.Search.TermQuery(new Lucene.Net.Index.Term("location", "spokane"));
Lucene.Net.Search.TermQuery tq4 = new Lucene.Net.Search.TermQuery(new Lucene.Net.Index.Term("type", "city"));
When I apply a search, lets say I want to apply the above Terms to filter my search, lets search for food...so my query format would look something like below
food AND ((tq1 OR tq2 OR tq3) AND tq4)
Currently I've been able to build it in the following format
{+xml:food +(location:seattle location:portland location:spokane +location:city)}
But, I am trying to get it in the format of
{+xml:food +(+(location:seattle location:portland location:spokane) +location:city)}
Basically, what I do is something like this...
Lucene.Net.Search.BooleanQuery bq = new Lucene.Net.Search.BooleanQuery();
Lucene.Net.Search.BooleanQuery innerBQ = new Lucene.Net.Search.BooleanQuery();
bq.Add("xml:food", Lucene.Net.Search.BooleanClause.Occur.MUST);
foreach (Lucene.Net.Index.Term term in listOfTerms)
{
Lucene.Net.Search.TermQuery tq = new Lucene.Net.Search.TermQuery(term));
innerBQ.Add(tq, Lucene.Net.Search.BooleanClause.Occur.SHOULD);
}
innerBQ.Add("location:city", Lucene.Net.Search.BooleanClause.Occur.MUST);
bq.Add(innerBQ, Lucene.Net.Search.BooleanClause.Occur.MUST);
Any suggestions are appreciated.
You need to add your location:city clause to bq instead of innerBQ
Related
I'm trying to create new vector layer with the same fields as contained in original layer.
original_layer_fields_list = original_layer.fields().toList()
new_layer = QgsVectorLayer("Point", "new_layer", "memory")
pr = new_layer.dataProvider()
However, when I try:
for fld in original_layer_fields_list:
type_name = fld.typeName()
pr.addAttributes([QgsField(name = fld.name(), typeName = type_name)])
new_layer.updateFields()
QgsProject.instance().addMapLayer(new_layer)
I get a layer with no fields in attribute table.
If I try something like:
for fld in original_layer_fields_list:
if fld.type() == 2:
pr.addAttributes([QgsField(name = fld.name(), type = QVariant.Int)])
new_layer.updateFields()
QgsProject.instance().addMapLayer(new_layer)
... it works like charm.
Anyway ... I'd rather like the first solution to work in case if one wants to automate the process and not check for every field type and then find an appropriate code. Besides - I really am not able to find any documentation about codes for data types. I managed to find this post https://gis.stackexchange.com/questions/353975/get-only-fields-with-datatype-int-in-pyqgis where in comments Kadir pointed on this sourcecode (https://codebrowser.dev/qt5/qtbase/src/corelib/kernel/qvariant.h.html#QVariant::Type).
I'd really be thankful for any kind of direction.
I want to retrieve the current element in LibreOffice Impress to apply changes to it.
For example, I'm trying to retrieve this shape to change the text in it with macros.
I tried to find information with the X-ray tool but without success.
To get the currently selected shape:
oSel = ThisComponent.getCurrentController.getSelection()
oShape = oSel.getByIndex(0)
Print oShape.getString()
To iterate through all shapes in the slide, start with ThisComponent.getDrawPages() and then use XrayTool.
You may also find the following snippet of python code helpful:
def iterate_draw_shapes():
oDrawPage = oDrawPages.getByIndex(1)
for oShape in oDrawPage:
if oShape.supportsService("com.sun.star.drawing.TextShape"):
oTexts = oShape.createEnumeration()
while oTexts.hasMoreElements():
oText = oTexts.nextElement()
oTextPortions = oText.createEnumeration()
while oTextPortions.hasMoreElements():
oTextPortion = oTextPortions.nextElement()
I am trying to build a basic search for my API backend. Users pass arbitrary queries and the backend is supposed to return results (obviously). I would prefer a solution that works with a local index as well as Elasticsearch.
On my entity I defined an analyzer like this:
#AnalyzerDef(name = "ngram",
tokenizer = #TokenizerDef(factory = StandardTokenizerFactory.class ),
filters = {
#TokenFilterDef(factory = StandardFilterFactory.class),
#TokenFilterDef(factory = LowerCaseFilterFactory.class),
#TokenFilterDef(factory = StopFilterFactory.class),
#TokenFilterDef(factory = NGramFilterFactory.class,
params = {
#Parameter(name = "minGramSize", value = "2"),
#Parameter(name = "maxGramSize", value = "3") } )
}
)
For the query, I tried the following:
FullTextEntityManager fullTextEntityManager = Search.getFullTextEntityManager(this.entityManager);
Analyzer analyzer = fullTextEntityManager.getSearchFactory().getAnalyzer("ngram");
QueryParser queryParser = new MultiFieldQueryParser(ALL_FIELDS, analyzer);
queryParser.setDefaultOperator(QueryParser.AND_OPERATOR);
org.apache.lucene.search.Query query = queryParser.parse(queryString);
javax.persistence.Query persistenceQuery =
fullTextEntityManager.createFullTextQuery(query, MyEntity.class);
List<MyEntity> result = persistenceQuery.getResultList();
As far as I understand, I need to provide an analyzer for the Query so that the search query are "ngram-tokenized" and a match can be found. Before, I used SimpleAnalyzer and as a result, the search only matched full words which - I think - backs my theory (Sorry, I am still learning this).
The above code gives me a NullPointerException:
java.lang.NullPointerException: null
at org.hibernate.search.engine.impl.ImmutableSearchFactory.getAnalyzer(ImmutableSearchFactory.java:370) ~[hibernate-search-engine-5.11.1.Final.jar:5.11.1.Final]
at org.hibernate.search.engine.impl.MutableSearchFactory.getAnalyzer(MutableSearchFactory.java:203) ~[hibernate-search-engine-5.11.1.Final.jar:5.11.1.Final]
at org.hibernate.search.impl.SearchFactoryImpl.getAnalyzer(SearchFactoryImpl.java:50) ~[hibernate-search-orm-5.11.1.Final.jar:5.11.1.Final]
in the line
Analyzer analyzer = fullTextEntityManager.getSearchFactory().getAnalyzer("ngram");
You cannot retrieve the analyzer from Hibernate Search when using the Elasticsearch integration, because in that case there is no analyzer locally: the analyzer only exists remotely, in the Elasticsearch cluster.
If you only need a subset of the query syntax, try out the "simple query string" query: it's a query that can be built using the DSL (so it will work the same with Lucene and Elasticsearch) and that provides the most common features (boolean queries, fuzziness, phrases, ...). For example:
Query luceneQuery = queryBuilder.simpleQueryString()
.onFields("name", "history", "description")
.matching("war + (peace | harmony)")
.createQuery();
The syntax is a bit different, but only because it's aiming at end users and tries to be simpler.
EDIT: If simple query strings are not an option, you can create an analyzer manually: this should work even when using the Elasticsearch integration.
org.apache.lucene.analysis.custom.CustomAnalyzer#builder() should be a good starting point. There are several examples in the javadoc of that class.
Make sure you only create the analyzer once and store it somewhere, e.g. in a static constant: creating an analyzer may be costly.
I am trying to get total marks obtained by a particular user, for a particular course for all the sections of that course.
The following query works and gives correct results with mysql, but not with Databse API calls
$sql = "SELECT d.section as section_id,d.name as section_name, sum(a.sumgrades) AS marks FROM mdl_quiz_attempts a, mdl_quiz b, mdl_course_modules c, mdl_course_sections d WHERE a.userid=6 AND b.course=4 AND a.quiz=b.id AND c.instance=a.quiz AND c.module=14 AND a.sumgrades>0 AND d.id=c.section GROUP BY d.section"
I tried different API calls, mainly I would want
$DB->get_records_sql($sql);
The results from API calls are meaningless. Any suggestion?
PS : This is moodle 2.2.
I just tried to do something similar, only without getting the sections. You only need the course and user id. I hope this helps you.
global $DB;
// get all attempts & grades from a user from every quiz of one course
$sql = "SELECT qa.id, qa.attempt, qa.quiz, qa.sumgrades AS grade, qa.timefinish, qa.timemodified, q.sumgrades, q.grade AS maxgrade
FROM {quiz} q, {quiz_attempts} qa
WHERE q.course=".$courseid."
AND qa.quiz = q.id
AND qa.userid = ".$userid."
AND state = 'finished'
ORDER BY qa.timefinish ASC";
$exams = $DB->get_records_sql($sql);
// calculate final grades from sum grades
$grades = array();
foreach($exams as $exam) {
$grade = new stdClass;
$grade->quiz = $exam->quiz;
$grade->attempt = $exam->attempt;
// sum to final
$grade->finalgrade = $exam->grade * ($exam->maxgrade / $exam->sumgrades);
$grade->grademax = $exam->maxgrade;
$grade->timemodified = $exam->timemodified;
array_push($grades, $grade);
}
This works in latest moodle version. Moodle 2.9. Although I am still open for better solution as this is really hacky way of getting deeper analytics about user's performance.
I was writing a search for one of our sites: (SITE A)
BooleanQuery booleanQuery = new BooleanQuery();
foreach (var field in fields)
{
QueryParser qp = new QueryParser(field, new StandardAnalyzer());
Query query = qp.Parse(search.ToLower() + "*");
if (field.Contains("Title")) { query.SetBoost((float)1.8); }
booleanQuery.Add(query, BooleanClause.Occur.SHOULD);
}
// CODE DIFFERENCE IS HERE
Query query2 = new TermQuery(new Term("StateProperties.IsActive", "True"));
booleanQuery.Add(query2, BooleanClause.Occur.MUST);
// END CODE DIFFERENCE
Lucene.Net.Search.TopScoreDocCollector collector = Lucene.Net.Search.TopScoreDocCollector.create(21, true);
searcher.Search(booleanQuery, collector);
hits = collector.TopDocs().scoreDocs;
this was working as expected.
since we own a few sites, and they use the same skeleton,
i uploaded the search to another site ( SITE B )
but the search stopped returning results.
after playing a round a bit with the code, i managed to make it work like so: (showing only the rewriten lines of code)
QueryParser qp2 = new QueryParser("StateProperties.IsActive", new StandardAnalyzer());
Query query2 = qp2.Parse("True");
booleanQuery.Add(query2, BooleanClause.Occur.MUST);
anyone knows why this is happening ?
i have checked the Lucene dll version, and its the same version in both sites (2.9.2.2)
is the code i have written in SITE A wrong ? is SITE B code wrong ?
is this my fault at all ? can production server infulance something like this ?
Doesn't they have individual indexes on disk? If they have been indexed differently, they would also return different results. One thing that comes to mind is if there is some sort of case sensitivity that matters, becayse a TermQuery will look for an EXACT match, where as the parser will try to tokenize/filter the search term according to the analyzer (and probably search for "true" instead of "True".