Creating Bar chart (Axis chart) with Multi Select Parameter in Helical Insight Community Reporting

Introduction: In this blog we are going to explain how to create a bar chart which represents the Source wise Cost of Travel with a filter based on Journey_type (multi-select). Please make sure you have gone through the blog “Introduction to Community Reporting Interface”

Steps to Creating Bar chart (Axis chart) with Multi Select Parameter in Helical Insight Community Reporting

1. Data Source
2. Dashboard Layout
3. Parameter
4. Report

1. Data source:

Create data source connection.

Here we are using connection type: plain JDBC

In the configuration of data source, provide the details as shown below.

<driver>com.mysql.jdbc.Driver</driver>   // sql driver 
<url>jdbc:mysql://192.168.2.51:3306/Travel_Data</url>  // jdbc url
<user>hiuser</user>  // database username
<pass>hiuser</pass>  // database password

Note: You can use any other kind of data source connection details. Rest of the steps are remaining the same.

2. Dashboard Layout:

In the dashboard layout we basically specify the layout of the report, dashboards, input parameters which we are creating. All the divs are specified here within which they get rendered.

Here we are creating 2 divs: client_name, client_wise

Input Parameters div is: client_name

Report div is: client_wise

When you click on dashboard layout a layout similar to below will appear:

In the above screenshot we find two options (left side)

HTML and CSS.

If you click on HTML/CSS the place holder for the respective component will be displayed and highlighted in the Dashboard layout panel.

We can place the code related to layout in HTML and styling in CSS.

Dashboard layout:

HTML:

<div class = "col-sm-4 col-md-4 col-xs-4" id="client_name">Travel Type</div>
<div id="client_wise"></div>

CSS:

In CSS place holder we can add the CSS related to Bar chart customization as well as report customization like back-ground color, report border, border-radius, color, etc.

3. Parameters :

Parameters are used to filter the report data. These parameters can be single select, multiple select, date range, slider, date picker, etc. We can create multiple parameters for the single report/dashboard.

When you click on the add button, the parameter is created with default name parameter1.

Click on “Pencil” icon and then rename the parameter as “Journey_Type”. We should place the code for Parameter configuration, parameter query in their respective place holders.

Click on apply button to save all the configurations.

In this sample we are creating parameter is “Multi-Select”

See the below screenshot for the configuration of this parameter.

A.Journey_Type: (Multi-select)

Choose connection as “connection1”(previously created in data sources)

Here “Journey_Type” is a Multi-select input control, so we need to choose input type as “Collection” as shown in below image. By default it is always “String”.

Note: For all multi-select parameters we should select “Collection” irrespective of parameter datatype. If it is a single select parameter we choose the type based on the datatype of parameters.

Configuration:

For multi-select parameters, you can either select parameter type as Select or Select2 or Checkbox. At the output level, you will see that the different parameter type gives different type of input parameter view.

var dashboard = Dashboard;

dashboard.resetAll();
dashboard.setVariable('Journey_Type',['Domestic']);

var Journey_Type = {
name: "Journey_Type",
type: "select",
parameters:["Journey_Type"],
options:{
multiple:true,
value : 'Journey_Type',
display : 'Journey_Type',
placeholder: 'Select Journey_Type'
},
htmlElementId : "#client_name",
executeAtStart: true,
map:1,
iframe:false
};
SQL :

select distinct Journey_Type as Journey_Type FROM  `Travel_Data`.`Traval`

Note: If you do not have any parameters please make sure that you will have to add below code in the “Report” configuration.

var dashboard = Dashboard
dashboard.resetAll();

In case if you delete the first parameter then also you need to provide the above code in “Report” configuration.

Note: The configuration script is added only for the first parameter. For all the remaining parameters, this script should be copied and repeated with the necessary changes.

4. Report:

We can configure different visualizations to render in different divs in the dashboard layout by clicking on add report button (see the screenshot)

In the left panel, we find the report, SQL, Visualization related options.

Click on configure, On the right side we can see the place holders for report configuration, SQL, Visualization. Place the respective code apply click on apply.

Here we need to choose chart type as “Bar chart”, connection as “connection1” and parameter (Journey_Type).

Report Configuration: 
var Barchart= {
name: "Barchart",
type:"chart",
listeners:["Journey_Type"],
requestParameters :{
Journey_Type : "Journey_Type"
},
vf : {
id: "1",
file: "__efwvf_name__"
},

htmlElementId : "#client_wise",
executeAtStart: true
};

SQL :

	select 
		`Travel_Data`.`Traval`.`source` as `source`,
		sum(cost) as cost  
		from
		`Travel_Data`.`Traval` 
		where Journey_Type = ${Journey_Type} 
		group by
		`source` limit 10

Visualization :

<Dimensions>source</Dimensions>
<Measures>cost</Measures>

Note: After placing the configuration, SQL, Visualization then click on apply or (control+s)

After completing all the steps save the community edition report.

In the back end server location the following files will be generated:

1. Efw (report view in the front end)
2. Efwce (editable file in the front end)
3. Efwvf
4. Html
5. Efwd

In the front end file browser, you will see the efw and efwce files as shown below

You can double click on the read mode report view file (with the extension EFW) and it will open like below.

Bar chart with multi-select parameter Report View:

For more details on EFWCE reporting refer the documentation :

EFWCE method of reporting in Helical Insight

For further assistance, kindly contact us on support@helicalinsight.com or post your queries at Helical Insight Forum