Class: ForestLiana::SearchQueryBuilder

Inherits:
Object
  • Object
show all
Defined in:
app/services/forest_liana/search_query_builder.rb

Instance Method Summary collapse

Constructor Details

#initialize(resource, params) ⇒ SearchQueryBuilder

Returns a new instance of SearchQueryBuilder.



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# File 'app/services/forest_liana/search_query_builder.rb', line 4

def initialize(resource, params)
  @resource = @records = resource
  @params = params
end

Instance Method Details

#association?(field) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/services/forest_liana/search_query_builder.rb', line 73

def association?(field)
  field = field.split(':').first if field.include?(':')
  @resource.reflect_on_association(field.to_sym).present?
end

#belongs_to_association?(field) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/services/forest_liana/search_query_builder.rb', line 137

def belongs_to_association?(field)
  field = field.split(':').first if field.include?(':')
  association = @resource.reflect_on_association(field.to_sym)
  [:belongs_to, :has_one].include?(association.try(:macro))
end

#belongs_to_filter ⇒ Object 



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# File 'app/services/forest_liana/search_query_builder.rb', line 165

def belongs_to_filter
  if @params[:filter]
    @params[:filter].each do |field, values|
      next unless belongs_to_association?(field)

      values.split(',').each do |value|
        @records = belongs_to_subfield_filter(field, value)
      end
    end
  end

  @records
end

#belongs_to_subfield_filter(field, value) ⇒ Object 



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# File 'app/services/forest_liana/search_query_builder.rb', line 143

def belongs_to_subfield_filter(field, value)
  field, subfield = field.split(':')

  association = @resource.reflect_on_association(field.to_sym)
  return if association.blank?

  operator, value = OperatorValueParser.parse(value)

  @records = @records
    .joins(field.to_sym)

  operator_date_interval_parser = OperatorDateIntervalParser.new(value)
  if operator_date_interval_parser.is_interval_date_value()
    filter = operator_date_interval_parser.get_interval_date_filter()
    @records = @records.where("#{association.table_name}.#{subfield} #{filter}")
  else
    where = "#{association.table_name}.#{subfield} #{operator}"
    where += " '#{value}'" if value
    @records = @records.where(where)
  end
end

#filter_param ⇒ Object 



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# File 'app/services/forest_liana/search_query_builder.rb', line 58

def filter_param
  if @params[:filter]
    @params[:filter].each do |field, values|
      next if association?(field)
      values.split(',').each do |value|
        operator, value = OperatorValueParser.parse(value)
        @records = OperatorValueParser.add_where(@records, field, operator,
                                                 value, @resource)
      end
    end
  end

  @records
end

#has_many_association?(field) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/services/forest_liana/search_query_builder.rb', line 78

def has_many_association?(field)
  field = field.split(':').first if field.include?(':')
  association = @resource.reflect_on_association(field.to_sym)

  [:has_many, :has_and_belongs_to_many].include?(association.try(:macro))
end

#has_many_field_filter(field, value) ⇒ Object 



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# File 'app/services/forest_liana/search_query_builder.rb', line 103

def has_many_field_filter(field, value)
  association = @resource.reflect_on_association(field.to_sym)
  return if association.blank?

  operator, value = OperatorValueParser.parse(value)

  @records = @records
    .select("#{@resource.table_name}.*,
            COUNT(#{association.table_name}.id)
            #{association.table_name}_has_many_count")
    .joins(ArelHelpers.join_association(@resource, association.name,
                                        Arel::Nodes::OuterJoin))
    .group("#{@resource.table_name}.id")
    .having("COUNT(#{association.table_name}) #{operator} #{value}")
end

#has_many_filter ⇒ Object 



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# File 'app/services/forest_liana/search_query_builder.rb', line 85

def has_many_filter
  if @params[:filter]
    @params[:filter].each do |field, values|
      next unless has_many_association?(field)

      values.split(',').each do |value|
        if field.include?(':')
          @records = has_many_subfield_filter(field, value)
        else
          @records = has_many_field_filter(field, value)
        end
      end
    end
  end

  @records
end

#has_many_subfield_filter(field, value) ⇒ Object 



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# File 'app/services/forest_liana/search_query_builder.rb', line 119

def has_many_subfield_filter(field, value)
  field, subfield = field.split(':')

  association = @resource.reflect_on_association(field.to_sym)
  return if association.blank?

  operator, value = OperatorValueParser.parse(value)

  @records = @records
    .select("#{@resource.table_name}.*,
            COUNT(#{association.table_name}.id)
            #{association.table_name}_has_many_count")
    .joins(ArelHelpers.join_association(@resource, association.name,
                                        Arel::Nodes::OuterJoin))
    .group("#{@resource.table_name}.id, #{association.table_name}.#{subfield}")
    .having("#{association.table_name}.#{subfield} #{operator} '#{value}'")
end

#perform ⇒ Object 



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# File 'app/services/forest_liana/search_query_builder.rb', line 9

def perform
  @records = search_param
  @records = filter_param
  @records = has_many_filter
  @records = belongs_to_filter

  @records
end

#search_param ⇒ Object 



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# File 'app/services/forest_liana/search_query_builder.rb', line 18

def search_param
  if @params[:search]
    conditions = []

    @resource.columns.each_with_index do |column, index|
      if column.name == 'id'
        conditions << "#{@resource.table_name}.id =
          #{@params[:search].to_i}"
      # NOTICE: Rails 3 do not have a defined_enums method
      elsif @resource.respond_to?(:defined_enums) &&
        @resource.defined_enums.has_key?(column.name) &&
        !@resource.defined_enums[column.name][@params[:search].downcase].nil?
        conditions << "\"#{@resource.table_name}\".\"#{column.name}\" =
          #{@resource.defined_enums[column.name][@params[:search].downcase]}"
      elsif !column.array && (column.type == :string ||
                              column.type == :text)
        conditions <<
          "LOWER(\"#{@resource.table_name}\".\"#{column.name}\") LIKE " +
          "'%#{@params[:search].downcase}%'"
      end
    end

    SchemaUtils.one_associations(@resource).map(&:name).each do |association|
      resource = @resource.reflect_on_association(association.to_sym)
      resource.klass.columns.each do |column|
        if !column.array && (column.type == :string || column.type == :text)
          conditions <<
            "LOWER(\"#{resource.table_name}\".\"#{column.name}\") LIKE " +
            "'%#{@params[:search].downcase}%'"
        end
      end
      @resource = @resource.eager_load(association.to_sym)
    end

    @records = @resource.where(conditions.join(' OR '))
  end

  @records
end