public static DatabaseQuery <T> WhereIn <T, K>(this DatabaseQuery <T> query, Expression <Func <T, object> > property,
DatabaseQuery <K> subquery, Expression <Func <K, object> > targetProperty)
where T : IEntity
where K : IEntity
{
return((DatabaseQuery <T>)query.WhereIn(property.GetPropertyPath(), subquery, targetProperty.GetPropertyPath()));
}
IEnumerable <IEntity> LoadTheAssociatedObjects(DatabaseQuery query)
{
var nestedQuery = Database.Of(Association.PropertyType);
var provider = nestedQuery.Provider;
return(nestedQuery
.Where(provider.GetAssociationInclusionCriteria(query, Association))
.Include(IncludedNestedAssociations)
.GetList());
}
internal override void Configure(DatabaseQuery query)
{
if (SqlCriteria.HasValue())
{
query.Where(new DirectDatabaseCriterion(SqlCriteria));
}
foreach (var item in Criterion.OrEmpty())
{
query.Where(item);
}
}
public DatabaseQuery CloneFor(Type type)
{
var result = new DatabaseQuery(type)
{
PageStartIndex = PageStartIndex,
TakeTop = TakeTop,
PageSize = PageSize
};
result.Criteria.AddRange(Criteria);
result.include.Add(include);
result.Parameters.Add(Parameters);
return(result);
}
DatabaseQuery WhereSubquery(string myField, DatabaseQuery subquery, string targetField, string @operator)
{
subquery.AliasPrefix = "Subq" + Guid.NewGuid().ToString().Remove("-").Substring(0, 6);
var sql = subquery.Provider
.GenerateSelectCommand(subquery, subquery.MapColumn(targetField));
sql = $"{MapColumn(myField)} {@operator} ({sql})";
Criteria.Add(Criterion.FromSql(sql));
foreach (var subQueryParam in subquery.Parameters)
{
Parameters.Add(subQueryParam.Key, subQueryParam.Value);
}
return(this);
}
public void LoadAssociations(DatabaseQuery query, IEnumerable <IEntity> mainObjects)
{
if (mainObjects.None())
{
return;
}
var associatedObjects = LoadTheAssociatedObjects(query);
var groupedObjects = GroupTheMainObjects(mainObjects);
var cachedField = query.EntityType.GetField("cached" + Association.Name,
BindingFlags.NonPublic | BindingFlags.Instance);
if (cachedField == null)
{
return;
}
foreach (var associatedObject in associatedObjects)
{
var group = groupedObjects.GetOrDefault(associatedObject.GetId());
if (group == null)
{
if (query.PageSize.HasValue)
{
continue;
}
throw new Exception("Database include binding failed.\n" +
"The loaded associated " + associatedObject.GetType().Name + " with id " + associatedObject.GetId() + "\n" + "is not referenced by any " + Association.DeclaringType.Name + "object!\n\n" +
"All associated " + Association.Name + " Ids are:\n" +
groupedObjects.Select(x => x.Key).ToLinesString());
}
foreach (var mainEntity in group)
{
BindToCachedField(cachedField, associatedObject, mainEntity);
}
}
}
public static T WhereIn <T, K>(this T query, DatabaseQuery <K> subquery, Expression <Func <K, object> > targetProperty)
where T : DatabaseQuery
where K : IEntity
=> query.WhereIn(subquery, targetProperty.GetPropertyPath());
public static DatabaseQuery <T> WhereIn <T>(this DatabaseQuery <T> query, Expression <Func <T, object> > property, DatabaseQuery subquery, string targetField)
where T : IEntity
=> (DatabaseQuery <T>)query.WhereIn(property.GetPropertyPath(), subquery, targetField);
public static T WhereIn <T>(this T query, DatabaseQuery subquery, string targetField)
where T : DatabaseQuery
=> query.WhereIn <T>("ID", subquery, targetField);
public static T WhereIn <T>(this T query, string myField, DatabaseQuery subquery, string targetField)
where T : DatabaseQuery
=> (T)query.WhereIn(myField, subquery, targetField);
internal abstract void Configure(DatabaseQuery query);
public DatabaseCriterionSqlGenerator(DatabaseQuery query)
{
Query = query;
EntityType = query.EntityType;
}
public SqlCriterionGenerator(DatabaseQuery query) : base(query)
{
}
internal override void Configure(DatabaseQuery query) => query.Page(StartIndex, PageSize);
DatabaseQuery WhereNotIn(string myField, DatabaseQuery subquery, string targetField)
{
return(WhereSubquery(myField, subquery, targetField, "NOT IN"));
}
