entityattr-class

Represents one entity attribute of data model.

public class Korzh.EasyQuery.EntityAttr
    : MetaEntityAttr, IComparable<EntityAttr>

Assembly: Korzh.EasyQuery.dll

Properties

Name	Type	Description
CustomFunc	string	Gets or sets the custom function.
Editors	EditorsMap	Gets the editors map.
Entity	Entity	Gets or sets the entity.
HasSubQuery	bool	Gets or sets a value indicating whether this attribute includes a sub-query in its expression.
IsAggregate	bool	Gets or sets a value indicating whether this attribute represents some aggregate column.
IsGhost	bool	Gets a value indicating whether this is a "ghost attribute" - an attribute which was not found in the model.
LookupAttr	EntityAttr	The lookup attribute
Model	DataModel	Gets the model.
Operations	OperatorList	Gets the list of operators which can be applied for this attribute.
Params	QueryParamList	The parameters associated with this entity attribute
UseInConditions	bool	Gets or sets a value indicating whether the attribute can be used in query conditions.
UseInResult	bool	Gets or sets a value indicating whether the attribute can be used in result columns (SELECT clause).
UseInSorting	bool	Gets or sets a value indicating whether the attribute can be used in sorting.

Methods

Name	Type	Description
AddParamsTo(QueryParamList paramList)	void	Adds all query parameters used in this attribute to the list passed via paramList.
CopyFrom(EntityAttr attr)	void	Copies all attribute's properties from another entity attribute
ExtractParamsFromExpr()	void	Parse attribute's expression and extract all parameters (like @Param1) used there.
FillOperatorsWithDefaults(DataModel model = null)	void	Fills the operators list with default operators depending of attribute type.
GetDefaultOperator()	Operator	Gets the default operator (usually it is first operator in Operations list).
GetValueEditor(Operator op, int operandIndex)	ValueEditor	Gets the most suitable value editor for this attribute and operator.
HasParams()	bool	Determines whether this attribute has parameters in its expression.
Hide()	void	Hides this entity attribute. It means that this function just sets all UseInResult, UseInConditions and UseInSorting properties to false.
OnModelAssignment()	void	Called when model is assigned.
ProcessVirtualExpr()	void	Scans attribute's expression for new parameters, tables, etc
ReadPropertyFromJsonAsync(JsonReader reader, string propName, CancellationToken ct)	Task	Reads one attribute's property from JSON (asynchronous way).
SetDefaultOperator(Operator op)	void	Sets the default operator.
WritePropertiesToJsonAsync(JsonWriter writer, BitOptions rwOptions, CancellationToken ct)	Task	Writes attribute properties to JSON (asynchronous way).