DbModel class

Database-related implementation of Korzh.EasyQuery.DataModel class. In addition to the basic data it contains also list of database tables and the links between them.

public class Korzh.EasyQuery.Db.DbModel
    : DataModel

Package: Korzh.EasyQuery.Db (targets: netstandard2.0)

Assembly: Korzh.EasyQuery.Db.dll

Constructors

Name	Type	Description
DbModel()	void	Initializes a new instance of the Korzh.EasyQuery.Db.DbModel class.

Properties

Name	Type	Description
DbParams	DbParameters	Gets the Korzh.EasyQuery.Db.DbParameters object that represents different options of database linked with current data model.
IsEmpty	bool	Gets a value indicating wether model is empty;
Links	TableLinkStore	List of links between the model tables.
PrimaryTableName	string	The name of the primary which will be used as a “root” table for this query (regardless it’s used already in any column/condition or not)
StoreDbParams	bool	Gets or sets a value indicating whether Korzh.EasyQuery.Db.DbModel.DbParams will be store in data model definition file.
TableCategories	TableCategoryList	Gets the list of table categories.
Tables	TableStore	Gets list of data model tables.

Methods

Name	Type	Description
AddEntityAttr(DbEntityAttrDescriptor desc)	DbEntityAttr	Adds a new attribute to the model.
AssignEntityAttrID(MetaEntityAttr attr)	void	Assigns the default ID for entity attribute.
Clear()	void	Clears this instance.
CreateEntityAttr(DbEntityAttrDescriptor desc)	DbEntityAttr	Creates the entity attribute. Used for creating entity attributes while building the model
CreateEntityAttrCore(MetaEntity entity, EntityAttrKind kind)	MetaEntityAttr
CreateNullOperator()	Operator	Creates the ‘null’ operator - a special operator which is used when a real operator can’t be found (e.g. wrong ID)
CreateOperator()	Operator	Creates the operator. Used for creating objects while building the model
CreateOperator(string id, string caption, string expr, string format)	Operator	Creates the operator. Used for creating objects while building the model
CreateQuery(Query parentQuery = null)	Query	Creates a Query object associated with this model
CreateTableAlias(DbTable fromTable, string aliasName, bool createEntity = True, string entityName = null, Func<TableLink, bool> linkFilter = null, Func<DbEntityAttr, bool> entityAttrFilter = null)	DbTable	Creates table alias from the table.
OnModelChanged()	void	Called after the model has been changed.
OnModelLoaded()	void	Called after the model has been loaded from some file or string.
ReadOneModelPropFromJsonAsync(JsonReader reader, string propName)	Task	Reads one model property from JSON (asynchronous way).
SetTableCategory(Table table, string categoryName)	bool	Sets the category of the table. Creates a new category if the specified one does not exist yet.
UpdateTableCategories()	void	Updates the categories in tables (usually after the loading).
WriteContentToJsonAsync(JsonWriter writer, BitOptions rwOptions)	Task	Writes the content of DbMomdel to JSON (asynchronous way).