Issues with keyField in Lightning DataTable - salesforce

Question

Having an issue getting the Record Ids of the selected record in Lightning Datatable.
Here is my controller
<!-- attributes -->
<aura:attribute name="dataArr" type="String[]"/>
<aura:attribute name="data" type="Object"/>
<aura:attribute name="columnsStr" type="String"/>
<aura:attribute name="columns" type="List"/>
<aura:attribute name="maxRowSelection" type="Integer" default="1"/>
<aura:attribute name="numOfRowsSelected" type="Integer" default="0"/>
<aura:attribute name="key" type="String" default="Id"/>
<aura:attribute name="recordId" type="String" />
<aura:attribute name="recordIds" type="String" />
<!-- handlers-->
<aura:handler name="init" value="{!this }" action="{! c.doInit }"/>
<div style="height: 300px">
<lightning:datatable keyField="{!v.key}"
data="{! v.data }"
columns="{! v.columns }"
maxRowSelection="{! v.maxRowSelection }"
onrowselection="{! c.setRecordId }"
/>
</div>
and here is my setRecordId function
setRecordId : function(component, event, helper){
var selectedRows = event.getParam('selectedRows');
var key = component.get('v.key');
var recIds = '';
console.log(selectedRows);
if(selectedRows){
if(selectedRows.length === 1){
console.log(selectedRows.id)
console.log(selectedRows[key])
console.log(selectedRows[0][key])
component.set('v.recordId', selectedRows[0][key]);
}
else{
for(let i = 0; i < selectedRows.length; i++){
recIds += selectedRows[i][key] + ',';
}
component.set('v.recordIds', recIds);
component.set('v.numOfRowsSelected', selectedRows.length);
}
}
},
Var selectedRows returns the correct selected row as an object within an array but i can't seem to find the correct syntax to access that records ID for some reason. Let me know if any additional information is needed here.
appreciate the help

Answer 1

You will have to iterate over the selected rows in a for-loop and you can then get the id references -
Something like -
for(var i=0; i<selectedRows.length; i++){
//This will give you the entire data for the row
console.log(selectedRows[i]);
//You can now fetch its Id as well as other parameters
...
}