public static Task <List <EntityT> > GetPageAsync <EntityT>(this ICrudAsync <EntityT> crud, int after, int take)
where EntityT : class
{
return(crud.Query()
.Skip(after)
.Take(take)
.ToListAsync());
}
public CrudRootResolver(ICrudAsync <TResolveEntity> crud)
{
this._crud = crud;
// id: ID!
base.Add(new QueryArgument <NonNullGraphType <IdGraphType> >
{
Name = "id",
Description = "Get by ID"
});
}
/// <summary>
/// This is a helper method for resolvers to resolve an entity via an <see cref="ICrudAsync"/>
/// </summary>
/// <param name="context">The GraphQL context. Used to access parameters.</param>
/// <param name="crud">The <see cref="ICrudAsync{EntityT}"/> used to resolve the entity.</param>
/// <param name="idParamName">The name of the GraphQL parameter containing the entity's ID. Defaults to 'id'.</param>
/// <param name="policy">The ASP Core policy that the user must pass in order to access this function.</param>
/// <param name="userContext">Used to gain access to the user performing this action.</param>
protected async Task <object> ResolveCrudAsync(
string policy,
ICrudAsync <TResolveEntity> crud,
IResolveFieldContext <object> context,
DataAccessUserContext userContext,
string idParamName = "id"
)
{
await userContext.EnforceHasPolicyAsync(policy);
// ARGS
var id = context.GetArgument <int>(idParamName);
// Find the entity
var entity = await crud.GetByIdAsync(id);
if (!entity.Succeeded)
{
throw new ExecutionError(entity.GatherErrorMessages().Aggregate((a, b) => $"{a}\n{b}"));
}
return(entity.Value);
}
