Class: Graphiti::Scope

Inherits:
Object show all
Defined in:
lib/graphiti/scope.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(object, resource, query, opts = {}) ⇒ Scope

Returns a new instance of Scope.



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# File 'lib/graphiti/scope.rb', line 5

def initialize(object, resource, query, opts = {})
  @object = object
  @resource = resource
  @query = query
  @opts = opts

  @object = @resource.around_scoping(@object, @query.hash) { |scope|
    apply_scoping(scope, opts)
  }
end

Instance Attribute Details

#object ⇒ Object

Returns the value of attribute object.



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# File 'lib/graphiti/scope.rb', line 3

def object
  @object
end

#pagination ⇒ Object (readonly)

Returns the value of attribute pagination.



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# File 'lib/graphiti/scope.rb', line 4

def pagination
  @pagination
end

#unpaginated_object ⇒ Object

Returns the value of attribute unpaginated_object.



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# File 'lib/graphiti/scope.rb', line 3

def unpaginated_object
  @unpaginated_object
end

Instance Method Details

#cache_key ⇒ Object 



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# File 'lib/graphiti/scope.rb', line 74

def cache_key
  # This is the combined cache key for the base query and the query for all sideloads
  # Changing the query will yield a different cache key

  cache_keys = sideload_resource_proxies.map { |proxy| proxy.try(:cache_key) }

  cache_keys << @object.try(:cache_key) # this is what calls into the ORM (ActiveRecord, most likely)
  ActiveSupport::Cache.expand_cache_key(cache_keys.flatten.compact)
end

#cache_key_with_version ⇒ Object 



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# File 'lib/graphiti/scope.rb', line 84

def cache_key_with_version
  # This is the combined and versioned cache key for the base query and the query for all sideloads
  # If any returned model's updated_at changes, this key will change

  cache_keys = sideload_resource_proxies.map { |proxy| proxy.try(:cache_key_with_version) }

  cache_keys << @object.try(:cache_key_with_version) # this is what calls into ORM (ActiveRecord, most likely)
  ActiveSupport::Cache.expand_cache_key(cache_keys.flatten.compact)
end

#parent_resource ⇒ Object 



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# File 'lib/graphiti/scope.rb', line 70

def parent_resource
  @resource
end

#resolve ⇒ Object 



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# File 'lib/graphiti/scope.rb', line 16

def resolve
  if @query.zero_results?
    []
  else
    resolved = broadcast_data { |payload|
      @object = @resource.before_resolve(@object, @query)
      payload[:results] = @resource.resolve(@object)
      payload[:results]
    }
    resolved.compact!
    assign_serializer(resolved)
    yield resolved if block_given?
    @opts[:after_resolve]&.call(resolved)
    resolve_sideloads(resolved) unless @query.sideloads.empty?
    resolved
  end
end

#resolve_sideloads(results) ⇒ Object 



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# File 'lib/graphiti/scope.rb', line 34

def resolve_sideloads(results)
  return if results == []

  concurrent = Graphiti.config.concurrency
  promises = []

  @query.sideloads.each_pair do |name, q|
    sideload = @resource.class.sideload(name)
    next if sideload.nil? || sideload.shared_remote?
    parent_resource = @resource
    graphiti_context = Graphiti.context
    resolve_sideload = -> {
      Graphiti.config.before_sideload&.call(graphiti_context)
      Graphiti.context = graphiti_context
      sideload.resolve(results, q, parent_resource)
      @resource.adapter.close if concurrent
    }
    if concurrent
      promises << Concurrent::Promise.execute(&resolve_sideload)
    else
      resolve_sideload.call
    end
  end

  if concurrent
    # Wait for all promises to finish
    sleep 0.01 until promises.all? { |p| p.fulfilled? || p.rejected? }
    # Re-raise the error with correct stacktrace
    # OPTION** to avoid failing here?? if so need serializable patch
    # to avoid loading data when association not loaded
    if (rejected = promises.find(&:rejected?))
      raise rejected.reason
    end
  end
end

#updated_at ⇒ Object Also known as: last_modified_at 



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# File 'lib/graphiti/scope.rb', line 94

def updated_at
  updated_time = nil
  begin
    updated_ats = sideload_resource_proxies.map(&:updated_at)
    updated_ats << @object.maximum(:updated_at)
    updated_time = updated_ats.compact.max
  rescue => e
    Graphiti.log(["error calculating last_modified_at for #{@resource.class}", :red])
    Graphiti.log(e)
  end

  updated_time || Time.now
end