When working with JSON data that specifies columnDefs and uses valueFormatters as a function, it is essential to correctly format the valueFormatter. For instance, if the JSON data reads valueFormatter: "dateFormatter" instead of valueFormatter: dateFormatter, how can one access the function?
The JSON is currently written as: (valueFormatter: "dateFormatter"), but in order to utilize valueFormater as a function, it should be written as: (valueFormatter: dateFormatter).
An improved approach to this task is to utilize Custom Column Types.
Simply include the type property in a column within your JSON:
{field:"athlete", type:"athleteType"}
Then connect the [columnTypes] Grid property:
<ag-grid-angular
[columnDefs]="columnDefs"
[columnTypes]="columnTypes"
/* other grid options ... */>
</ag-grid-angular>
Within the columnTypes, you can now define your valueFormatter function:
// define a column type (multiple definitions possible)
this.columnTypes = {
athleteType: { valueFormatter: params => 'athlete' },
};
If you decide to use a String for this process, the grid may not render correctly at first because it will attempt to format with the String.
Therefore, shortly after setting it up, you will need to update the columnDefs.
You will need to locate the function, update the columnDef to have the valueFormatter point to the function, and then use setColumnDefs and refreshRows to rebuild the DOM with the function assigned.
For example:
// obtain the current column definitions
var columnDefs = gridOptions.api.getColumnDefs();
// iterate through each one
columnDefs.forEach(colDef =>{
// if it has a valueFormatter
if(colDef.valueFormatter){
// and it is a string
if(typeof colDef.valueFormatter == "string"){
// if the function is found
if(window[colDef.valueFormatter]
&& typeof window[colDef.valueFormatter]=="function"){
// assign the function as the valueFormatter
colDef.valueFormatter = window[colDef.valueFormatter];
}
}
}
});
// reconfigure the grid with the updated definitions
gridOptions.api.setColumnDefs(columnDefs);
// trigger a redraw to apply the function
gridOptions.api.redrawRows();
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