github.com/hectorcorrea/solr

Solr

A Solr client written in Go.

This client is geared towards supporting a web user interface that queries and filters via facets. This package provides a lot of the functionality to know what facets the user is filtering on and allow the user interface to add and remove more facets to the existing search.

Project https://github.com/hectorcorrea/solrdora is an example of a complete web application using this package.

Source code

• solr.go: the main entry point, functions Get() and Search() are defined here.
• getParams.go: parameter for the Get() function.
• searchParams.go: parameter for the Search() function.
• searchResponse.go: the object used to represent the results of a Search()
• filterQueries.go: represent the fq values passed to Solr.
• document.go: represents a document retrieved from Solr via Search() or Get().

Examples of use (basic)

Search for documents

q := "title:\"one two three\""

solr := solr.New("http://localhost:8983/solr/your-core")
results, err := solr.SearchText(q)

log.Printf("Documents found: %d", results.NumFound)
for i, doc := range results.Documents {
  log.Printf("%d %v", i, doc)
}

Get one Solr document by ID

q := "id:123"
fl := []string{}
options := map[string]string{}
params := NewGetParams(q, fl, options)

solr := solr.New("http://localhost:8983/solr/your-core")
doc, err := solr.Get(params)

log.Printf("%v", doc)

More examples

Search for documents customizing list of fields to retrieve, facets, and other parameters.

# In a web app qs will be req.URL.Query() where req is
# the *http.Request that you get in your HTTP handler.
qs := url.Values{
  "q":  []string{"title:\"one two\""},
  "fq": []string{"subject|Geography"},
}

options := map[string]string{
  "defType": "edismax",
}

facets := map[string]string{
  "publisher": "Publisher name",
  "subject_str": "Subject",
}

params := NewSearchParamsFromQs(qs, options, facets)
params.Fl = []string{"id", "title", "authorsAll", "_version_"}

solr := solr.New("http://localhost:8983/solr/your-core")
results, err := solr.Search(params)

log.Printf("Documents found: %d", results.NumFound)
for i, doc := range results.Documents {
  log.Printf("%d %v", i, doc)
}

A full-blow example using this library can be found in the SolrDora repo.

The GoDoc documentation for this package can be found here