Module: Ansr::QueryMethods

Includes:
ActiveRecord::QueryMethods, Configurable
Included in:
Base, Relation
Defined in:
lib/ansr/relation/query_methods.rb

Instance Method Summary collapse

Methods included from Configurable

#config

Instance Method Details

#all_filter_fields ⇒ Object 



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# File 'lib/ansr/relation/query_methods.rb', line 93

def all_filter_fields
  FACETS
end

#all_sort_fields ⇒ Object 



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# File 'lib/ansr/relation/query_methods.rb', line 97

def all_sort_fields
  SORTS
end

#build_filter(opts, other = []) ⇒ Object

cloning from ActiveRecord::QueryMethods.build_where as a first pass



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# File 'lib/ansr/relation/query_methods.rb', line 122

def build_filter(opts, other=[])
  case opts
    when String, Array
      #TODO: Remove duplication with: /activerecord/lib/active_record/sanitization.rb:113
      values = Hash === other.first ? other.first.values : other

      values.grep(ActiveRecord::Relation) do |rel|
        self.bind_values += rel.bind_values
      end
      opts = (other.empty? ? opts : ([opts] + other))
      [model().send(:sanitize_sql, opts, model().table_name)]
    when Hash
      attributes = model().send(:expand_hash_conditions_for_sql_aggregates, opts)

      attributes.keys.each do |k|
        sk = filter_name(k)
        attributes[sk] = attributes.delete(k) unless sk.eql? k.to_s
      end
      attributes.values.grep(ActiveRecord::Relation) do |rel|
        self.bind_values += rel.bind_values
      end

      ActiveRecord::PredicateBuilder.build_from_hash(model(), attributes, model().table)
    else
      [opts]
  end
end

#collapse_wheres(arel, wheres) ⇒ Object 



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# File 'lib/ansr/relation/query_methods.rb', line 111

def collapse_wheres(arel, wheres)
  predicates = wheres.map do |where|
    next where if ::Arel::Nodes::Equality === where
    where if String === where
    ::Arel::Nodes::Grouping.new(where)
  end

  arel.where(::Arel::Nodes::And.new(predicates)) if predicates.present?
end

#field_name(expr) ⇒ Object 



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# File 'lib/ansr/relation/query_methods.rb', line 60

def field_name(expr)
  if expr.is_a? Array
    return expr.collect{|x| field_name(x)}.compact
  else
    case expr
    when ::Arel::Nodes::Binary
      if expr.left.relation.name != model().name
        # oof, this is really hacky
        field_name = "#{expr.left.relation.name}.#{expr.left.name}".to_sym
      else
        field_name = expr.left.name.to_sym
      end
    when ::Arel::Attributes::Attribute
      if expr.relation.name != model().name
        # oof, this is really hacky
        field_name = "#{expr.relation.name}.#{expr.name}".to_sym
      else
        field_name = expr.name.to_sym
      end
    when ::Arel::Nodes::Unary
      if expr.expr.relation.name != model().name
        # oof, this is really hacky
        field_name = "#{expr.expr.relation.name}.#{expr.expr.name}".to_sym
      else
        field_name = expr.expr.name.to_sym
      end
    else
      field_name = expr.to_sym
    end
    return field_name
  end
end

#filter(args) ⇒ Object 



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# File 'lib/ansr/relation/query_methods.rb', line 37

def filter(args)
  check_if_method_has_arguments!("filter", args)
  spawn.filter!(args)
end

#filter!(args) ⇒ Object 



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# File 'lib/ansr/relation/query_methods.rb', line 42

def filter!(args)
  return self if args.empty?

  filter_where = build_filter(args)
  return self unless filter_where
  filter_name = filter_name(filter_where)
  if (filter_name)
    @klass = @klass.view(*filter_where)
    model().projections += Array(filter_name)
  end

  self
end

#filter_name(expr) ⇒ Object 



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# File 'lib/ansr/relation/query_methods.rb', line 56

def filter_name(expr)
  connection.sanitize_filter_name(field_name(expr))
end

#filter_values ⇒ Object 



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# File 'lib/ansr/relation/query_methods.rb', line 28

def filter_values
  @values[:filter] ||= []
end

#filter_values=(values) ⇒ Object

Raises:

  • (ImmutableRelation) 


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# File 'lib/ansr/relation/query_methods.rb', line 32

def filter_values=(values)
  raise ImmutableRelation if @loaded
  @values[:filter] = values
end

#find(id) ⇒ Object 



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# File 'lib/ansr/relation/query_methods.rb', line 101

def find(id)
  klass = model()
  rel = klass.build_default_scope.where(klass.table.primary_key.name => id).limit(1)
  rel.to_a
  unless rel.to_a[0]
    raise 'Bad ID'
  end
  rel.to_a.first
end

#find_by_nosql(arel, bind_values) ⇒ Object 



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# File 'lib/ansr/relation/query_methods.rb', line 150

def find_by_nosql(arel, bind_values)
  query = model.connection.to_nosql(arel, bind_values)
  aliases = model.connection.to_aliases(arel, bind_values)
  model.connection.execute(query, aliases)
end