Class: Topic

Inherits:
ControlledVocabularyTerm show all
Includes:
Shared::Tags
Defined in:
app/models/topic.rb

Overview

A Topic is a user defined subject. It is used in conjuction with a citation on an OTU.

Topics assert that “this source says something about this taxon on this topic.”

Constant Summary

Constant Summary

Constants inherited from ControlledVocabularyTerm

ControlledVocabularyTerm::ALTERNATE_VALUES_FOR

Instance Attribute Summary

Attributes inherited from ControlledVocabularyTerm

#definition, #name, #project_id, #type, #uri, #uri_relation

Class Method Summary (collapse)

Methods inherited from ControlledVocabularyTerm

#uri_relation_is_a_skos_relation

Methods included from Housekeeping

#has_polymorphic_relationship?

Class Method Details

+ (Object) find_for_autocomplete(params)

TODO: Deprecate for CVT + params (if not already done)



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# File 'app/models/topic.rb', line 25

def self.find_for_autocomplete(params)
  term = "#{params[:term]}%"
  where_string = "name LIKE '#{term}' OR name ILIKE '%#{term}' OR name = '#{term}' OR definition ILIKE '%#{term}'"
  ControlledVocabularyTerm.where(where_string).where(project_id: params[:project_id], type: 'Topic')
end

+ (Hash) select_optimized(user_id, project_id, klass, target = 'Citation')

if `Content` then not used

Returns:

  • (Hash)

    topics optimized for user selection



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# File 'app/models/topic.rb', line 61

def self.select_optimized(user_id, project_id, klass, target = 'Citation')
  h = {
    quick: [],
    pinboard: Topic.pinned_by(user_id).where(project_id: project_id).to_a
  }

  case target
    when 'Citation'
      h[:recent] = Topic.where(project_id: project_id)
                     .used_on_klass(klass).used_recently('Citation').limit(10).distinct.to_a
    when 'Content'
      h[:recent] = Topic.joins(:contents)
                     .where(project_id: project_id).used_recently('Content').limit(10).distinct.to_a
  end

  h[:quick] = (Topic.pinned_by(user_id)
                 .pinboard_inserted.where(project_id: project_id).to_a + h[:recent][0..3]).uniq
  h
end

+ (Scope) used_recently(used_on = 'Citation')

Returns the max 10 most recently used topics, as used on Content or Citation

Parameters:

  • used_on (String) (defaults to: 'Citation')

    one of `Citation` (default) or `Content`

Returns:

  • (Scope)

    the max 10 most recently used topics, as used on Content or Citation



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# File 'app/models/topic.rb', line 34

def self.used_recently(used_on = 'Citation')
  t = case used_on
        when 'Citation'
          CitationTopic.arel_table
        when 'Content'
          Content.arel_table
      end

  p = Topic.arel_table

  # i is a select manager
  i = t.project(t['topic_id'], t['created_at']).from(t)
        .where(t['created_at'].gt(1.weeks.ago))
        .order(t['created_at'])

  # z is a table alias
  z = i.as('recent_t')

  Topic.joins(
    Arel::Nodes::InnerJoin.new(z, Arel::Nodes::On.new(z['topic_id'].eq(p['id'])))
  ).distinct.limit(10)
end