(Quick Reference)

8 Example - Reference Documentation

Authors: Manuarii Stein, Stephane Maldini, Serge P. Nekoval

Version: 0.18.7.1-SNAPSHOT

8 Example

The domains

class Tweet {
  static searchable = {
    message boost:2.0
  }  static belongsTo = [
          user:User
  ]
  static hasMany = [
          tags:Tag
  ]
  static constraints = {
    tags nullable:true, cascade:'save, update'
  }
  String message = ''
  Date dateCreated = new Date()
}

class User {
  static searchable = {
    except = 'password'
    lastname boost:20
    firstname boost:15, index:'not_analyzed'
    listOfThings index:'no'
    someThings index:'no'
    tweets component:true
  }  static constraints = {
    tweets cascade:'all'
  }
  static hasMany = [
          tweets:Tweet
  ]
  static mappedBy = [
          tweets:'user'
  ]
  String lastname
  String firstname
  String password
  String activity = 'Evildoer'
  String someThings = 'something'
  ArrayList<String> listOfThings = ['this', 'that', 'andthis']
}

class Tag {
  static searchable = {
    except=['boostValue']
  }  String name
  Integer boostValue = 1
}

The controller

A action triggering indexation

ElasticSearchController (testCaseService is just dealing with GORM instructions):

class ElasticSearchController {
  def elasticSearchService
  def testCaseService  def postTweet = {
    if(!params.user?.id) {
      flash.notice = "No user selected."
      redirect(action: 'index')
      return
    }
    User u = User.get(params.user.id)
    if (!u) {
      flash.notice = "User not found"
      redirect(action: 'index')
      return
    }
    // Create tweet
    testCaseService.addTweet(params.tweet?.message, u, params.tags)
    flash.notice = "Tweet posted"
    redirect(action: 'index')
  }
}

With this code (considering that there are already User in the database), new Tweets will be indexed automatically, and corresponding User indexed documents will be updated since we have set the tweets association as component.

Searching for Tweets

def searchForUserTweets = {
    def tweets = Tweet.search("${params.message.search}").searchResults
    def tweetsMsg = 'Messages : '
    tweets.each {
      tweetsMsg += "<br />Tweet from ${it.user?.firstname} ${it.user?.lastname} : ${it.message} "
      tweetsMsg += "(tags : ${it.tags?.collect{t -> t.name}})"
    }
    flash.notice = tweetsMsg
    redirect(action: 'index')
}

Searching for anything

def searchAll = {
    def res = elasticSearchService.search("${params.query}").searchResults
    def resMsg = '<strong>Global search result(s):</strong><br />'
    res.each {
      switch(it){
        case Tag:
          resMsg += "<strong>Tag</strong> ${it.name}<br />"
          break
        case Tweet:
          resMsg += "<strong>Tweet</strong> "${it.message}" from ${it.user.firstname} ${it.user.lastname}<br />"
          break
        case User:
          resMsg += "<strong>User</strong> ${it.firstname} ${it.lastname}<br />"
          break
        default:
          resMsg += "<strong>Other</strong> ${it}<br />"
          break
      }    }
    flash.notice = resMsg
    redirect(action:'index')
 }

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