public static async Task <ExecutionResult> ExecuteMutationAsync(
QueryContext context)
{
var(schema, _, operation, initialValue, coercedVariableValues) = context;
var executionContext = context.BuildExecutorContext(new SerialExecutionStrategy());
var path = new NodePath();
var mutationType = schema.Mutation;
if (mutationType == null)
{
throw new QueryExecutionException(
"Schema does not support mutations. Mutation type is null.",
path);
}
var selectionSet = operation.SelectionSet;
var data = await SelectionSets.ExecuteSelectionSetAsync(
executionContext,
selectionSet,
mutationType,
initialValue,
path).ConfigureAwait(false);
return(new ExecutionResult
{
Errors = executionContext
.FieldErrors
.Select(context.FormatError).ToList(),
Data = data?.ToDictionary(kv => kv.Key, kv => kv.Value)
});
}
private static async Task <ExecutionResult> ExecuteSubscriptionEventAsync(
IExecutorContext context,
OperationDefinition subscription,
IReadOnlyDictionary <string, object?> coercedVariableValues,
object evnt,
Func <Exception, ExecutionError> formatError)
{
var subscriptionType = context.Schema.Subscription;
var selectionSet = subscription.SelectionSet;
var path = new NodePath();
var data = await SelectionSets.ExecuteSelectionSetAsync(
context,
selectionSet,
subscriptionType,
evnt,
path).ConfigureAwait(false);
var result = new ExecutionResult
{
Errors = context.FieldErrors.Select(formatError).ToList(),
Data = data?.ToDictionary(kv => kv.Key, kv => kv.Value)
};
return(result);
}
private static async Task <object> CompleteInterfaceValueAsync(
IExecutorContext executorContext,
ObjectType actualType,
IReadOnlyCollection <GraphQLFieldSelection> fields,
object value,
NodePath path,
InterfaceType interfaceType)
{
if (!actualType.Implements(interfaceType))
{
throw new CompleteValueException(
"Cannot complete value as interface. " +
$"Actual type {actualType.Name} does not implement {interfaceType.Name}",
path,
fields.First());
}
var subSelectionSet = SelectionSets.MergeSelectionSets(fields);
var data = await SelectionSets.ExecuteSelectionSetAsync(
executorContext,
subSelectionSet,
actualType,
value,
path).ConfigureAwait(false);
return(data);
}
private static async Task <object> CompleteUnionValueAsync(
IExecutorContext executorContext,
ObjectType actualType,
IReadOnlyCollection <GraphQLFieldSelection> fields,
object value,
NodePath path,
UnionType unionType)
{
if (!unionType.IsPossible(actualType))
{
throw new CompleteValueException(
"Cannot complete value as union. " +
$"Actual type {actualType.Name} is not possible for {unionType.Name}",
path,
fields.First());
}
var subSelectionSet = SelectionSets.MergeSelectionSets(fields);
var data = await SelectionSets.ExecuteSelectionSetAsync(
executorContext,
subSelectionSet,
actualType,
value,
path).ConfigureAwait(false);
return(data);
}
private static async Task <object> CompleteObjectValueAsync(IExecutorContext executorContext, List <GraphQLFieldSelection> fields, object value,
Dictionary <string, object> coercedVariableValues, NodePath path, ObjectType fieldObjectType)
{
var subSelectionSet = SelectionSets.MergeSelectionSets(fields);
var data = await SelectionSets.ExecuteSelectionSetAsync(
executorContext,
subSelectionSet,
fieldObjectType,
value,
coercedVariableValues,
path).ConfigureAwait(false);
return(data);
}
private static async Task <object> CompleteObjectValueAsync(
IExecutorContext executorContext,
IReadOnlyCollection <GraphQLFieldSelection> fields,
object value,
NodePath path,
ObjectType fieldObjectType)
{
var subSelectionSet = SelectionSets.MergeSelectionSets(fields);
var data = await SelectionSets.ExecuteSelectionSetAsync(
executorContext,
subSelectionSet,
fieldObjectType,
value,
path).ConfigureAwait(false);
return(data);
}
public static async Task <ExecutionResult> ExecuteQueryAsync(
QueryContext context)
{
var(schema, _, operation, initialValue, coercedVariableValues) = context;
var queryType = schema.Query;
var path = new NodePath();
if (queryType == null)
{
throw new QueryExecutionException(
"Schema does not support queries. Query type is null.",
path);
}
var selectionSet = operation.SelectionSet;
var executionContext = context.BuildExecutorContext(new ParallelExecutionStrategy());
IDictionary <string, object?>?data;
try
{
data = await SelectionSets.ExecuteSelectionSetAsync(
executionContext,
selectionSet,
queryType,
initialValue,
path).ConfigureAwait(false);
}
catch (QueryExecutionException e)
{
executionContext.AddError(e);
data = null;
}
return(new ExecutionResult
{
Errors = executionContext
.FieldErrors
.Select(context.FormatError)
.ToList(),
Data = data?.ToDictionary(kv => kv.Key, kv => kv.Value)
});
}