SAP UI5: Error Binding DatePicker Controls and Filtering with OData Model

[rimene99]

Problem Description: I am facing an issue where I am unable to properly bind DatePicker controls in an SAP UI5 fragment and use them for filtering an OData model. Specifically, when I try to retrieve values from the DatePicker controls and apply filters to the OData model, I encounter the error sap.m.MessageToast.show("DatePicker controls are not available."); This error suggests that the DatePicker controls are not accessible, but they are part of the opened fragment.

Scenario: I have a fragment that includes two DatePicker controls (DPFrom and DPTo), and I want to use them for filtering records based on a date range (ALERTE_CRE_DATE) from an OData model. The error occurs when trying to access the DatePicker values in the controller. you should know that the fragment is opend

Here’s a part of the relevant code I’m working with: 

<core:FragmentDefinition xmlns="sap.m" xmlns:core="sap.ui.core">
    <Dialog
        id="helloWorldDialog"
        title="Date Selection"
        class="sapUiResponsivePadding"
        resizable="true"
        stretchOnPhone="true"
        afterClose="onDialogClose">
        
        <Panel
            id="datePanel"
            width="auto">
            
            <!-- 'From' DatePicker -->
            <Label text="From:" labelFor="DPFrom"/>
            <DatePicker
                id="DPFrom"
                placeholder="Enter From Date..."
                change="handleChangeFrom"
                class="sapUiSmallMarginBottom"/>

            <!-- 'To' DatePicker -->
            <Label text="To:" labelFor="DPTo"/>
            <DatePicker
                id="DPTo"
                placeholder="Enter To Date..."
                change="handleChangeTo"
                class="sapUiSmallMarginBottom"/>
         
            <FlexBox
                height="30px"
                alignItems="End"
                justifyContent="End">
                <items>
                    <Button text="Select" press="onSelectPress" type="Emphasized" class="sapUiSmallMarginEnd" />
                    <Button text="Cancel" press="onCancelPress" class="sapUiTinyMarginEnd" />
                </items>
            </FlexBox>
        </Panel>
    </Dialog>
</core:FragmentDefinition>

onhandleDate: function(oEvent) {
    var that = this;
    if (!this._valueHelpDialogDate) {
        this._valueHelpDialogDate = sap.ui.xmlfragment("DateFilter", "com.faurecia.stockMonitorCatalog.view.ValueHelpDialogDate", this);
        this.getView().addDependent(this._valueHelpDialogDate); // Ensures the fragment is added as a dependent
    }
    this._valueHelpDialogDate.open();
},

onSelectPress: function(oEvent) {
    var oFromDate = this.byId("DPFrom");
    var oToDate = this.byId("DPTo");

    // Check if the DatePicker controls are available
    if (!oFromDate || !oToDate) {
        sap.m.MessageToast.show("DatePicker controls are not available.");
        return;
    }

    var fromDateValue = oFromDate.getDateValue();
    var toDateValue = oToDate.getDateValue();

    if (fromDateValue && toDateValue) {
        // Create filters for the OData model
        var aFilters = [
            new sap.ui.model.Filter("ALERTE_CRE_DATE", sap.ui.model.FilterOperator.GE, fromDateValue),
            new sap.ui.model.Filter("ALERTE_CRE_DATE", sap.ui.model.FilterOperator.LE, toDateValue)
        ];

        // Apply filters to the OData model and read data
        var oModel = this.getView().getModel("listModel");
        oModel.read("/StockDataSet", {
            filters: aFilters,
            success: function(oData) {
                // Update the model with the filtered data
                var oFilteredModel = new sap.ui.model.json.JSONModel(oData.results);
                this.getView().setModel(oFilteredModel, "filteredModel");

                // Close the DatePicker dialog
                this._valueHelpDialogDate.close();
            }.bind(this),  // Bind the correct context
            error: function() {
                sap.m.MessageToast.show("Error occurred while fetching data.");
            }
        });
    } else {
        sap.m.MessageToast.show("Please select both 'From' and 'To' dates.");
    }
}

[GuruprasadGL · Accepted solution]

Hi @rimene99 ,

The problem lies in how you are trying to access the DatePickers in the controller, in the lines below:

 var oFromDate = this.byId("DPFrom");
 var oToDate = this.byId("DPTo");

this.byId("") does not work because it can only access controls inside the view and not inside the fragment. 

You can replace the above section of your code with the below code:

var oFromDate = sap.ui.core.Fragment.byId("DateFilter", "DPFrom");
var oToDate = sap.ui.core.Fragment.byId("DateFilter", "DPTo");

Please let me know if this helped solve your problem!

Also please have a look at the latest standards to load fragments in you controller here!