Important: This documentation is about an older version. It's relevant only to the release noted, many of the features and functions have been updated or replaced. Please view the current version.
FieldCache class
Signature
export declare class FieldCache
Import
import { FieldCache } from '@grafana/data';
Constructors
Constructor | Modifiers | Description |
---|---|---|
constructor(data) | Constructs a new instance of the FieldCache class |
Properties
Property | Modifiers | Type | Description |
---|---|---|---|
fields | FieldWithIndex[] |
Methods
Method | Modifiers | Description |
---|---|---|
getFieldByName(name) | Returns the first field with the given name. | |
getFields(type) | ||
getFieldsByLabel(label, value) | Returns the fields with the given label. | |
getFirstFieldOfType(type, includeHidden) | ||
hasFieldNamed(name) | ||
hasFieldOfType(type) | ||
hasFieldWithNameAndType(name, type) |
constructor(data)
Constructs a new instance of the FieldCache
class
Signature
constructor(data: DataFrame);
Parameters
Parameter | Type | Description |
---|---|---|
data | DataFrame |
fields property
Signature
fields: FieldWithIndex[];
getFieldByName method
Returns the first field with the given name.
Signature
getFieldByName(name: string): FieldWithIndex | undefined;
Parameters
Parameter | Type | Description |
---|---|---|
name | string |
Returns:
FieldWithIndex | undefined
getFields method
Signature
getFields(type?: FieldType): FieldWithIndex[];
Parameters
Parameter | Type | Description |
---|---|---|
type | FieldType |
Returns:
FieldWithIndex[]
getFieldsByLabel method
Returns the fields with the given label.
Signature
getFieldsByLabel(label: string, value: string): FieldWithIndex[];
Parameters
Parameter | Type | Description |
---|---|---|
label | string | |
value | string |
Returns:
FieldWithIndex[]
getFirstFieldOfType method
Signature
getFirstFieldOfType(type: FieldType, includeHidden?: boolean): FieldWithIndex | undefined;
Parameters
Parameter | Type | Description |
---|---|---|
type | FieldType | |
includeHidden | boolean |
Returns:
FieldWithIndex | undefined
hasFieldNamed method
Signature
hasFieldNamed(name: string): boolean;
Parameters
Parameter | Type | Description |
---|---|---|
name | string |
Returns:
boolean
hasFieldOfType method
Signature
hasFieldOfType(type: FieldType): boolean;
Parameters
Parameter | Type | Description |
---|---|---|
type | FieldType |
Returns:
boolean
hasFieldWithNameAndType method
Signature
hasFieldWithNameAndType(name: string, type: FieldType): boolean;
Parameters
Parameter | Type | Description |
---|---|---|
name | string | |
type | FieldType |
Returns:
boolean