CouchDB Day NYC 2017: Full Text Search
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This document provides instructions for performing full-text search using Cloudant. It includes steps to create a Cloudant account, set up an index, add documents, perform searches, handle pagination and sorting, and configure tokenization for text fields. Users are shown examples of searching by field values, getting the next page of results, sorting, and using different analyzers.
![Tokenization Examples
> curl https://$account.cloudant.com/_search_analyze –Hcontent-type:application/json –d '{"analyzer":"standard",
"text": "rnewson@apache.org"}'
{"tokens":["rnewson","apache.org"]}
> curl https://$account.cloudant.com/_search_analyze –Hcontent-type:application/json –d '{"analyzer":"email",
"text": "rnewson@apache.org"}'
{"tokens":["rnewson@apache.org"]}
> curl https://$account.cloudant.com/_search_analyze –Hcontent-type:application/json –d '{"analyzer":"english",
"text": "running"}'
{"tokens":["run"]}](https://image.slidesharecdn.com/fulltextlab-170221230926/85/CouchDB-Day-NYC-2017-Full-Text-Search-8-320.jpg)
CouchDB Day NYC 2017: Full Text Search
- 1. CouchDB Developer Day Full-Text Search Lab
- 2. Create a Cloudant account • Go to https://cloudant.com/sign-up/ • Sign up!
- 3. Setup curl $account.cloudant.com/foo –X PUT curl $account.cloudant.com/foo/_design/bar –X PUT –d '{"indexes":{"baz":{"index":"function(doc){index("color", doc.color); index("size", doc.size);}"}}}' curl $account.cloudant.com/foo/doc 1 –X PUT –d '{"size": "small", "color": "green"}' curl $account.cloudant.com/foo/doc2 –X PUT –d '{"size": "large", "color": "green"}' curl $account.cloudant.com/foo/doc3 –X PUT –d '{"size": "small", "color": "red"}'
- 4. Searching curl $account.cloudant.com/foo/_design/bar/_search/baz?q=size:small curl $account.cloudant.com/foo/_design/bar/_search/baz?q=size:large curl $account.cloudant.com/foo/_design/bar/_search/baz?q=color:red curl $account.cloudant.com/foo/_design/bar/_search/baz?q=size:small%20AND%20color:red
- 5. Pagination Every search request returns a "bookmark" attribute. Pass this back to Cloudant to get the next "page" of results. curl https://$account.cloudant.com/foo/_design/bar/_search/baz?q=*:*&limit=1 curl https://$account.cloudant.com/_design/bar/_search/baz?q=*:*&limit=1&bookmark=g2wAAAABaANkA B9kYmNvcmVAZGI1LmplbmV2ZXIuY2xvdWRhbnQubmV0bAAAAAJhAGI_____amgCRj_wAAAAAA AAYQBq
- 6. Sorting The "sort" parameter lets you sort results on any indexed field or combination of indexed fields. curl https://$account.cloudant.com/foo/_design/bar/_search/baz?q=*:*&sort="size<string>" curl https://$account.cloudant.com/foo/_design/bar/_search/baz?q=*:*&sort="color<string>"
- 7. Tokenization (https://docs.cloudant.com/search.html) • Tokenizers break down textual input into tokens for efficient and flexible searching • Using an appropriate tokenizer is often critical • Generic analyzers: standard, email, keyword, whitespace • Language specific analyzers: english, french, german, spanish, chinese, dutch... • You can configure different analyzers for different fields • Some tokenizers omit common words • Some tokenizers omit common prefixes or suffixes
- 8. Tokenization Examples > curl https://$account.cloudant.com/_search_analyze –Hcontent-type:application/json –d '{"analyzer":"standard", "text": "rnewson@apache.org"}' {"tokens":["rnewson","apache.org"]} > curl https://$account.cloudant.com/_search_analyze –Hcontent-type:application/json –d '{"analyzer":"email", "text": "rnewson@apache.org"}' {"tokens":["rnewson@apache.org"]} > curl https://$account.cloudant.com/_search_analyze –Hcontent-type:application/json –d '{"analyzer":"english", "text": "running"}' {"tokens":["run"]}