Query class

Represents Query.

Index

Constructors

constructor

Public Properties

Public Methods

Protected Methods

createSimpleConditionObject

Constructors

constructor

The default constructor. ⊕ new Query(model?: DataModel,data?: QueryData,options?: QueryOptions): Query

Parameters:

model: DataModel, Optional - The data model.
data: QueryData, Optional - JSON representation object.
options: QueryOptions, Optional - The options.

Public Properties

attributeExprTag

The attributec class name (Tag).

● attributeExprTag: ExprTag

clientListRequestHandler

● clientListRequestHandler: any

extraData

Contains user-defined extra data for current query.

● extraData: any

isNewbie

● isNewbie: boolean = true

model

The Data Model associated with this query.

● model: DataModel

serverListRequestHandler

● serverListRequestHandler: any

timezoneOffset

Current timezone offset (it’s sent to the server for proper date/time values processing).

● timezoneOffset: number

Public Methods

addChangedCallback

Add changed callback

▸ addChangedCallback(callback: (event: EqEvent) => void): string

Parameters:

callback: (event: EqEvent) => void - The callback ID.

Returns string

addColumn

Adds a new column with specified parameters

▸ addColumn(descriptor: ColumnDescriptor,author?: string): Column

Parameters:

descriptor: ColumnDescriptor
author: string, Optional - The author of this operation. This parameter is used in EasyQuery widgets only to indicate which of the initiates the change.

Returns Column

Example:

query.addColumn({
    attributeId: 'Customers.CompanyName',
    sortIndex: SortDirection.Ascending
}});

addColumnObj

Adds a new column with specified index.

▸ addColumnObj(column: Column | Column[],index: any,author: any): void

Parameters:

column: Column | Column[] - The column or array of columns
index: any - The index of new column
author: any - The author.

Returns void

Example:

const column = new Column();
column.caption = "Company name";

query.addColumn(column, 1)

addConditionGroup

Adds a condition group - a group of simple conditions (predicates) linked by AND or OR

▸ addConditionGroup(descriptor: ConditionGroupDescriptor,addChildCondition?: boolean): Condition

Parameters:

descriptor: ConditionGroupDescriptor - The descriptor of the new condition group.
addChildCondition: boolean, Default value = true

Returns Condition - The new search condition.

addProcessCallback

Add process callback

▸ addProcessCallback(callback: (event: EqEvent) => void): string

Parameters:

callback: (event: EqEvent) => void - The callback.

Returns string

addSimpleCondition

Adds a new simple condition (a predicate)

▸ addSimpleCondition(descriptor: SimpleConditionDescriptor): Condition

Parameters:

descriptor: SimpleConditionDescriptor - The descriptor which defines different parameters of the new condition

Returns Condition - The new condition.

changeColumnType

Changes column to Aggregate function, custom expression or simple column.

▸ changeColumnType(column: Column,tag: ExprTag,args?: any): void

Parameters:

column: Column - The column to change.
tag: ExprTag - New column expression tag.
args: any, Optional - The arguments (Contains aggregate function id)

Returns void

clear

Clears query (all conditions and columns).

▸ clear(): void

Returns void

clearColumns

Clears all columns in query

▸ clearColumns(): void

Returns void

clearConditions

Clears all conditions in query.

▸ clearConditions(): void

Returns void

createColumn

▸ createColumn(): Column

Returns Column

createCondition

▸ createCondition(tag?: CondTag): Condition

Parameters:

tag: CondTag, Default value = CondTag.Simple

Returns Condition

fireChangedEvent

Fires change event.

▸ fireChangedEvent(data?: QueryChangeEventData,postpone?: number,wasModified?: boolean): void

Parameters:

data: QueryChangeEventData, Optional - The data.
postpone: number, Default value = 0 - The postpone.
wasModified: boolean, Default value = true

Returns void

fireColumnsChangedEvent

▸ fireColumnsChangedEvent(action?: QueryChangeAction,column?: Column | Column[]): void

Parameters:

action: QueryChangeAction, Optional
column: Column | Column[], Optional

Returns void

fireConditionsChangedEvent

▸ fireConditionsChangedEvent(action?: QueryChangeAction,condition?: Condition | Condition[]): void

Parameters:

action: QueryChangeAction, Optional
condition: Condition | Condition[], Optional

Returns void

fireProcessEvent

Fires process event.

▸ fireProcessEvent(data: any): void

Parameters:

data: any - The data.

Returns void

getColumnSortIndex

Gets Colummn sorting index.

▸ getColumnSortIndex(col: Column): number

Parameters:

col: Column - The column.

Returns number

getColumns

Get array of columns.

▸ getColumns(): Column[]

Returns Column[]

getConditionsText

Retruns conditions text

▸ getConditionsText(): string

Returns string

getDescription

Gets description of the query.

▸ getDescription(): string

Returns string

getId

Gets query ID.

▸ getId(): string

Returns string - The ID>

getModel

Gets DataModel object associated with this query.

▸ getModel(): DataModel

Returns DataModel

getName

Gets name of the query.

▸ getName(): string

Returns string

getOneValueForAttr

Gets one value for the attribute

▸ getOneValueForAttr(attrId: string): string

Parameters:

attrId: string - The attribute ID.

Returns string

getRootCondition

Gets root predicate

▸ getRootCondition(): Condition

Returns Condition

getSortedColumns

Gets array of columns used in sorting

▸ getSortedColumns(): Column[]

Returns Column[]

isEmptyColumns

Checks wether query does not contains any column.

▸ isEmptyColumns(): boolean

Returns boolean

isEmptyConditions

Checks wether query does not contains any condtion.

▸ isEmptyConditions(): boolean

Returns boolean

isEx

▸ isEx(): boolean

Returns boolean

isModified

▸ isModified(): boolean

Returns boolean

loadFromData

▸ loadFromData(data: QueryData,changeStatus?: boolean): void

Parameters:

data: QueryData
changeStatus: boolean, Default value = true

Returns void

loadFromDataOrJson

Sets data to the query.

▸ loadFromDataOrJson(data: QueryData | string,changeStatus?: boolean): void

Parameters:

data: QueryData | string - JSON representation object or JSON string
changeStatus: boolean, Default value = true - Indicate whether we should change the “isModified” status (by default == true)

Returns void

loadFromJson

Loads query from JSON.

▸ loadFromJson(json: string,changeStatus?: boolean): void

Parameters:

json: string - The JSON string.
changeStatus: boolean, Default value = true

Returns void

loadModelData

Loads data model.

▸ loadModelData(model: ModelPlainData | string): void

Parameters:

model: ModelPlainData | string - JSON representation object or JSON string.

Returns void

moveColumn

Moves the column with specified index to another position.

▸ moveColumn(index1: number,index2: number): void

Parameters:

index1: number - The index of the column that should be moved.
index2: number - The index of the position the column should be moved to

Returns void

regenerateId

Regenerates current query ID.

callbackId: string - The callback ID.

Returns void

reset

▸ reset(silent?: boolean): void

Parameters:

silent: boolean, Default value = true

Returns void

toJSON

Returns JSON representation of this query.

▸ toJSON(): string

Returns string

toJSONData

Returns JSON representation of this query.

▸ toJSONData(): QueryData

Returns QueryData

Protected Methods

createSimpleConditionObject

▸ createSimpleConditionObject(attr: EntityAttr,operator: Operator,inputValues: string | Array<string>): Condition

Parameters:

attr: EntityAttr
operator: Operator
inputValues: string | Array<string>

Returns Condition