Explaining the ValueAccessor for the columns in the Syncfusion grid

Question

Explaining the ValueAccessor for the columns in the Syncfusion grid

I have implemented a valueAccessor for a specific column in my SyncFusion Grid as shown below:

export interface GridColumn<idT> {
  ...
  valueAccessor?: (
    field: string,
    data: GridData<idT>,
    column: Column
  ) => ValueAccessor | string;
}

Here is how the column is defined:

{
     field: 'decimalCount',
     headerText: 'Decimals',
     textAlign: GridTextAlign.Center,
     headerTextAlign: GridTextAlign.Center,
     width: 50,
     editType: GridEditType.NumericTextBox,
     valueAccessor: (
        field: string,
        data: Partial<CustomDataGridData>
     ): string => data[field] ?? 'N/A',
}

However, I am encountering the following error:

Element implicitly has an 'any' type because expression of type 'string' can't be used to index type 'Partial<CustomDataGridData>'.
No index signature with a parameter of type 'string' was found on type 'Partial<CustomDataGridData>'.

In the code file, the valueAccessor is utilized like this:

<e-column
    ...
    [valueAccessor]="column.valueAccessor ?? null"
>

To resolve this issue, I had to cast the data object to any => (data as any)[field] ?? 'N/A', which fixed the problem. However, I am unsure about the underlying reason behind it.

typescript syncfusion ej2-syncfusion

Answer 1

Answer №1

After analyzing the code snippet provided, it appears that a custom type has been set for the data argument. The error indicates that the 'string' type value returned in the data is not present in the custom interface. To resolve this issue, please directly set the data type as an Object, as shown in the following code snippet:

{field: 'decimalCount', valueAccessor: (field: string, data: Object): string => data[field] ?? 'N/A'}

For more information on defining a value accessor using TypeScript for Angular Grid columns, you can refer to the documentation link below:

Documentation:

You can also view a sample prepared based on this concept for your reference at the link below:

Sample: https://stackblitz.com/edit/angular-8azapo-z2qdpl?file=app.component.ts

Answer 2

After analyzing the code snippet provided, it appears that a custom type has been set for the data argument. The error indicates that the 'string' type value returned in the data is not present in the custom interface. To resolve this issue, please directly set the data type as an Object, as shown in the following code snippet:

{field: 'decimalCount', valueAccessor: (field: string, data: Object): string => data[field] ?? 'N/A'}

For more information on defining a value accessor using TypeScript for Angular Grid columns, you can refer to the documentation link below:

Documentation:

You can also view a sample prepared based on this concept for your reference at the link below:

Sample: https://stackblitz.com/edit/angular-8azapo-z2qdpl?file=app.component.ts

Answer 3

Answer №2

My solution was to resolve the issue by specifically referencing the field name:

valueAccessor: (_,data: Partial<CustomDataGridData>): string | number => data.decimalCount ?? 'N/A',

Answer 4

My solution was to resolve the issue by specifically referencing the field name:

valueAccessor: (_,data: Partial<CustomDataGridData>): string | number => data.decimalCount ?? 'N/A',

Answer 5

Answer №3

When using the value accessor function, the Grid will return data directly as an Object type because the field types are anonymous. You can refer to the API documentation linked below for more information:

API:

In the code provided, it is evident that a custom type has been defined for the value accessor function data at the sample level (data: GridData). This can lead to issues since the Object type data returned from the Grid may not match with this custom type.

To resolve this issue, ensure that the data type is set as Object in your sample level GridColumn interface, as shown in the code snippet below:

export interface GridColumn <idT> { ...
valueAccessor?: (
    field: string,
    data: Object,
    column: Column
) => ValueAccessor | string; }

Answer 6

When using the value accessor function, the Grid will return data directly as an Object type because the field types are anonymous. You can refer to the API documentation linked below for more information:

API:

In the code provided, it is evident that a custom type has been defined for the value accessor function data at the sample level (data: GridData). This can lead to issues since the Object type data returned from the Grid may not match with this custom type.

To resolve this issue, ensure that the data type is set as Object in your sample level GridColumn interface, as shown in the code snippet below:

export interface GridColumn <idT> { ...
valueAccessor?: (
    field: string,
    data: Object,
    column: Column
) => ValueAccessor | string; }

Explaining the ValueAccessor for the columns in the Syncfusion grid

Answer №1

Answer №2

Answer №3

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