Class: ElasticGraph::SchemaArtifacts::RuntimeMetadata::ScalarType

Inherits:
Object
  • Object
show all
Defined in:
lib/elastic_graph/schema_artifacts/runtime_metadata/scalar_type.rb

Overview

Provides runtime metadata related to scalar types.

Constant Summary collapse

DEFAULT_COERCION_ADAPTER_REF = 
{
  "name" => "ElasticGraph::GraphQL::ScalarCoercionAdapters::NoOp",
  "require_path" => "elastic_graph/graphql/scalar_coercion_adapters/no_op"
}
DEFAULT_INDEXING_PREPARER_REF = 
{
  "name" => "ElasticGraph::Indexer::IndexingPreparers::NoOp",
  "require_path" => "elastic_graph/indexer/indexing_preparers/no_op"
}

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.coercion_adapter_extension_loader ⇒ Object 



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# File 'lib/elastic_graph/schema_artifacts/runtime_metadata/scalar_type.rb', line 18

def self.coercion_adapter_extension_loader
  @coercion_adapter_extension_loader ||= ExtensionLoader.new(ScalarCoercionAdapterInterface)
end

.indexing_preparer_extension_loader ⇒ Object 



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# File 'lib/elastic_graph/schema_artifacts/runtime_metadata/scalar_type.rb', line 22

def self.indexing_preparer_extension_loader
  @indexing_preparer_extension_loader ||= ExtensionLoader.new(ScalarIndexingPreparerInterface)
end

.load_many(scalar_type_hashes_by_name) ⇒ Object

Loads multiple ‘ScalarType`s from a hash mapping a scalar type name to its serialized hash form (matching what `to_dumpable_hash` returns). We expose a method this way because we want to use a single loader for all `ScalarType`s that need to get loaded, as it performs some caching for efficiency.



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# File 'lib/elastic_graph/schema_artifacts/runtime_metadata/scalar_type.rb', line 40

def self.load_many(scalar_type_hashes_by_name)
  scalar_type_hashes_by_name.transform_values do |hash|
    new(
      coercion_adapter_ref: hash.fetch("coercion_adapter"),
      indexing_preparer_ref: hash.fetch("indexing_preparer", DEFAULT_INDEXING_PREPARER_REF),
      grouping_missing_value_placeholder: hash["grouping_missing_value_placeholder"]
    )
  end
end

Instance Method Details

#load_coercion_adapter ⇒ Object

Loads the coercion adapter. This is done lazily on first access (rather than eagerly in ‘load_many`) to allow us to remove a runtime dependency of `elasticgraph-schema_artifacts` on `elasticgraph-graphql`. The built-in coercion adapters are defined in `elasticgraph-graphql`, and we want to be able to load runtime metadata without requiring the `elasticgraph-graphql` gem (and its dependencies) to be available. For example, we use runtime metadata from `elasticgraph-indexer` but do not want `elasticgraph-graphql` to be loaded as part of that.

elasticgraph-graphql provides the one caller that calls this method, ensuring that the adapters are available to be loaded.



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# File 'lib/elastic_graph/schema_artifacts/runtime_metadata/scalar_type.rb', line 59

def load_coercion_adapter
  Extension.load_from_hash(coercion_adapter_ref, via: self.class.coercion_adapter_extension_loader)
end

#load_indexing_preparer ⇒ Object 



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# File 'lib/elastic_graph/schema_artifacts/runtime_metadata/scalar_type.rb', line 63

def load_indexing_preparer
  Extension.load_from_hash(indexing_preparer_ref, via: self.class.indexing_preparer_extension_loader)
end

#to_dumpable_hash ⇒ Object 



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# File 'lib/elastic_graph/schema_artifacts/runtime_metadata/scalar_type.rb', line 67

def to_dumpable_hash
  {
    # Keys here are ordered alphabetically; please keep them that way.
    "coercion_adapter" => load_coercion_adapter.to_dumpable_hash,
    "grouping_missing_value_placeholder" => grouping_missing_value_placeholder,
    "indexing_preparer" => load_indexing_preparer.to_dumpable_hash
  }
end