Using Filters, you can restrict search to URL or domain, meta fields, file type or content type, language, size ranges, intervals based on date, etc. Filtered search can be implemented for a subset of a collection, or on a group of collections.
Filters can be directly implemented from queries. The different filter options are listed here.
Filters can be given as URL params or facet filters using UI. Follow the following links for more information. [http://developer.searchblox.com/docs/search-parameters](🔗) [http://developer.searchblox.com/docs/faceted-search](🔗)
## **Filters for URL**
You can use this filter to restrict results based on the URL, domain or subpaths. If you want results with the domain name www.bbc.com, the query can be given as Example: url:"en.wikipedia.org"
To filter the results based on domain, you can also search subpaths: Example: url:"/travel"
If you dont want results from a particular domain or subpath, use the prefix - in the beginning of the field Example: -url:"en.wikipedia.org" or -url:"/travel"
Example URLs [http://localhost:8080/searchblox/servlet/SearchServlet?query=* AND url:"en.wikipedia.org"]([http://localhost:8080/searchblox/servlet/SearchServlet?query=*](🔗) AND url:"en.wikipedia.org") or [http://localhost:8080/searchblox/servlet/SearchServlet?query=*&filter=url:"en.wikipedia.org"](🔗)
## **Filters for Language**
Filtering can be done based on language using the following filters: Example: language:en _for filtering results in English_
language:ja _for filtering results in Japanese_
Please refer to this page for different language codes. [http://developer.searchblox.com/docs/search-parameters](🔗)
Example URL [http://localhost:8080/searchblox/servlet/SearchServlet?query=*AND language:en]([http://localhost:8080/searchblox/servlet/SearchServlet?query=*AND](🔗) language:en) or [http://localhost:8080/searchblox/servlet/SearchServlet?query=*&filter=language:ja](🔗)
## **Filters for File Types**
File types can be filtered using the following filters: contenttype:pdf _for filtering pdf files_
contenttype:word _for filtering word files_
For the file formats supported, refer to [http://developer.searchblox.com/docs/supported-file-formats](🔗).
Example URL [http://localhost:8080/searchblox/servlet/SearchServlet?query=* AND contenttype:pdf]([http://localhost:8080/searchblox/servlet/SearchServlet?query=*](🔗) AND contenttype:pdf) or [http://localhost:8080/searchblox/servlet/SearchServlet?query=*&filter=contenttype:word](🔗)
## **Filters for Meta Tags**
Based on meta tags indexed, filtering can be done using the following filter parameters. For example, if the meta tag is **category**, you can use filter: category:fruit
Example URL [http://localhost:8080/searchblox/servlet/SearchServlet?query=* AND category:fruit]([http://localhost:8080/searchblox/servlet/SearchServlet?query=*](🔗) AND category:fruit) or [http://localhost:8080/searchblox/servlet/SearchServlet?query=*&filter=category:fruit](🔗)
Filters can also be given for **title**, **keywords**, **description **and any **other fields** indexed in collections in SearchBlox.
## **NOT filter**
NOT filter can be used to avoid certain term or field. For example if you do not want the collection test you can give this parameter as shown &filter=NOT(colname:test) Similarly this NOT filter can be used for SearchBlox as well as meta fields [http://localhost:8080/searchblox/servlet/SearchServlet?query=*&filter=NOT(contenttype:word)]([http://localhost:8080/searchblox/servlet/SearchServlet?query=*&filter=NOT(contenttype:word](🔗)) [http://localhost:8080/searchblox/servlet/SearchServlet?query=*&filter=NOT(category:fruit)]([http://localhost:8080/searchblox/servlet/SearchServlet?query=*&filter=NOT(category:fruit](🔗))
## **Multiple filters**
Multiple filters can be used using boolean operators, please find few examples here: **Multiple titles** [http://localhost:8080/searchblox/servlet/SearchServlet?facet=true&query=*&filter=title:(bbc%20OR%20Africa)]([http://localhost:8080/searchblox/servlet/SearchServlet?facet=true&query=*&filter=title:(bbc%20OR%20Africa](🔗)) [http://localhost:8080/searchblox/servlet/SearchServlet?facet=true&query=*&filter=title:(bbc%20AND%20Africa)]([http://localhost:8080/searchblox/servlet/SearchServlet?facet=true&query=*&filter=title:(bbc%20AND%20Africa](🔗)) **Multiple urls** [http://localhost:8080/searchblox/servlet/SearchServlet?facet=true&query=*&filter=url:("www.cnn.com"OR"www.bbc.com")]([http://localhost:8080/searchblox/servlet/SearchServlet?facet=true&query=*&filter=url:("www.cnn.com"OR"www.bbc.com"](🔗))
**Multiple fields** [http://localhost:8080/searchblox/servlet/SearchServlet?facet=true&query=*&filter=url:("www.cnn.com"OR"www.bbc.com")AND(title:2018)AND(keywords:flood](🔗))
# **Facet Filters**
One can provide facet filters in url using a set of parameters Prerequisite: It is required to add the field in ../searchblox/webapps/searchblox/WEB-INF/mapping.json, only then it would be possible to use facet filters for the field. **Step 1: ** Initially it is required to enable the facet parameter by giving the value as true. This can be given once in the url if there are multiple facets facet=true **Step 2: ** Declare the name of the field as shown facet.field=testfield **Step 3: ** If the field is a text or string one can provide size to limit the number of filter results f.textfield.size=20 If the field is a date or numerical value then you need to provide range Number: f.numfield.range=[\*TO500] Date: f.datefield.range=[\*TO2019-06-20] **Step 4:** Then the filter can be provided as shown: Text: f.textfield.filter=test Number: f.numfield.filter=[100TO200] Date: f.datefield.filter=[2012-06-20TO2016-06-20]
## **Sample facet filters:**
Text: facet=true&facet.field=textfield&f.textfield.size=25&f.textfield.filter=travel Number: facet=true&facet.field=numfield&f.numfield.range=[\*TO500]& f.numfield.filter=[100TO200] Date: facet=true&facet.field=datefield&f.datefield.range=[\*TO2019-06-20]& f.numfield.filter=[2012-06-20TO2016-06-20]
## **Configuring String Facet Filters**
**Step 1:** Add the facet field in ../searchblox/WEB-INF/mapping.json "textfield": { "type": "text", "store": true, "fielddata": true, "analyzer": "comma_analyzer" }, **Step 2:** Clear and reindex **Step 3:**Give 4 filter parameters that is, enable filter, declare the field, specify size and then filter facet=true&facet.field=textfield&f.textfield.size=25&f.textfield.filter=travel example: [http://localhost:8080/searchblox/servlet/SearchServlet?query=time&facet=true&facet.field=textfield&f.textfield.size=25&f.textfield.filter=travel](🔗)
## ** Configuring Numerical Facet Filters**
**Step 1:** Add the facet field in ../searchblox/WEB-INF/mapping.json "numfield": { "type": "double", "store": true, "index": false }, **Step 2:** Clear and reindex **Step 3:**Give 4 filter parameters that is, enable filter, declare the field, specify range and then filter facet=true&facet.field=numfield&f.numfield.range=[\*TO500]& f.numfield.filter=[100TO200] example: [[http://localhost:8080/searchblox/servlet/SearchServlet?query=time&facet=true&facet.field=numfield&f.numfield.range=[\*TO500]&](🔗) f.numfield.filter=[100TO200]]([http://localhost:8080/searchblox/servlet/SearchServlet?query=time&facet=true&facet.field=numfield&f.numfield.range=[\*TO500]&](🔗) f.numfield.filter=[100TO200])
## ** Configuring Date Facet Filters**
**Step 1:** Add the facet field in ../searchblox/WEB-INF/mapping.json "datefield": { "type": "date", "store": "yes", "include_in_all": "false" }, **Step 2:** Clear and reindex **Step 3:**Give 4 filter parameters that is, enable filter, declare the field, specify range and then filter facet=true&facet.field=datefield&f.datefield.range=[\*TO2019-06-20]& f.numfield.filter=[2012-06-20TO2016-06-20] example: [[http://localhost:8080/searchblox/servlet/SearchServlet?query=time&facet=true&facet.field=datefield&f.datefield.range=[\*TO2019-06-20]&](🔗) f.numfield.filter=[2012-06-20TO2016-06-20]]([http://localhost:8080/searchblox/servlet/SearchServlet?query=time&facet=true&facet.field=datefield&f.datefield.range=[\*TO2019-06-20]&](🔗) f.numfield.filter=[2012-06-20TO2016-06-20])