/// <summary>
/// Add PK and FK fields, as hidden ones, if they weren´t already provided in the metadata.xml configuration.
/// This avoid common mistakes.
/// </summary>
private static void AddHiddenRequiredFields(ApplicationSchemaDefinition schema)
{
var idFieldDefinition = schema.Fields.FirstOrDefault(f => f.Attribute == schema.IdFieldName);
if (idFieldDefinition == null && !schema.Abstract)
{
//if its abstract, it may be declared on the child schemas, so we wont take any action
var idField = ApplicationFieldDefinition.HiddenInstance(schema.ApplicationName, schema.IdFieldName);
schema.Displayables.Add(idField);
}
CreateMissingRelationshipFields(schema);
}
private static void CreateMissingRelationshipFields(ApplicationSchemaDefinition schema)
{
foreach (var dataProviderContainer in schema.DataProviderContainers)
{
if (schema.Fields.All(f => f.Attribute != dataProviderContainer.Target))
{
//adding hidden field to the from clause, in the case it wasn´t explicity declared in the metadata.xml
var fromField = ApplicationFieldDefinition.HiddenInstance(schema.ApplicationName, dataProviderContainer.Target);
schema.Displayables.Add(fromField);
}
}
}
private static IEnumerable <IApplicationAttributeDisplayable> InverseFKsFields(ApplicationSchemaDefinition thisSchema)
{
var resultList = new List <IApplicationAttributeDisplayable>();
var applications = MetadataProvider.Applications();
if (MetadataProvider.InternalCache == null)
{
MetadataProvider.InternalCache = new MetadataProviderInternalCache();
}
var cache = MetadataProvider.InternalCache;
var relationshipName = EntityUtil.GetRelationshipName(thisSchema.ApplicationName);
if (!cache.RelationshipsByNameCache.ContainsKey(relationshipName))
{
return(resultList);
}
var relationships = MetadataProvider.InternalCache.RelationshipsByNameCache[relationshipName];
foreach (var association in relationships)
{
var entityAssociation = association.EntityAssociation;
foreach (var attribute in entityAssociation.Attributes)
{
if (attribute.To != null)
{
resultList.Add(ApplicationFieldDefinition.HiddenInstance(thisSchema.ApplicationName,
attribute.To));
}
}
}
return(resultList);
}
