How to send data to table component using node-jasper? - jasper-reports

Question

I have a task to generate PDFs with nodeJS, so i am working with the node-jasper library.
I try to display a table component but when i send dataset from back-end, it keeps showing empty table.
here is my nodjs code:
const express = require('express')
const app = express()
const port = 5000
var jasper = require('node-jasper')({
path: './lib/jasperreports-6.10.0',
reports: {
hw: {
jasper: './jasperFiles/repportBI.jasper',
jrxml: './reports/repportBI.jrxml',
conn: 'in_memory_json'
}
},
});
app.get('/jasper1', (req, res) => {
var report = {
report: 'hw',
data: {
title: "My test report",
Dataset1: jasper.toJsonDataSource(
{
dados: [
{
code: 'e1',
name: 'raouf',
function: 'Developer'
},
{
code: 'e2',
name: 'djamel',
function: 'Developer'
},
{
code: 'e3',
name: 'omar',
function: 'Medecine'
}
]
},
'dados'
),
}
,
dataset: { }
}
var pdf = jasper.pdf(report);
res.set({
'Content-type': 'application/pdf',
'Content-Length': pdf.length
});
res.send(pdf)
});
app.listen(port, () => {
console.log('app is runing on port: ', port)
})
here is my jrxml file:
<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Jaspersoft Studio version 6.10.0.final using JasperReports Library version 6.10.0-unknown -->
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="repportBI" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="95744304-ed70-4001-8031-6cec31c7acbf">
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="One Empty Record"/>
<style name="Table 1_TH" mode="Opaque" backcolor="#F0F8FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
<topPen lineWidth="0.5" lineColor="#000000"/>
<leftPen lineWidth="0.5" lineColor="#000000"/>
<bottomPen lineWidth="0.5" lineColor="#000000"/>
<rightPen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="Table 1_CH" mode="Opaque" backcolor="#BFE1FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
<topPen lineWidth="0.5" lineColor="#000000"/>
<leftPen lineWidth="0.5" lineColor="#000000"/>
<bottomPen lineWidth="0.5" lineColor="#000000"/>
<rightPen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="Table 1_TD" mode="Opaque" backcolor="#FFFFFF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
<topPen lineWidth="0.5" lineColor="#000000"/>
<leftPen lineWidth="0.5" lineColor="#000000"/>
<bottomPen lineWidth="0.5" lineColor="#000000"/>
<rightPen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<subDataset name="Dataset1" uuid="70370722-01b1-41a5-a681-3d6a28fa2f84">
<queryString>
<![CDATA[]]>
</queryString>
<field name="code" class="java.lang.String"/>
<field name="name" class="java.lang.String"/>
<field name="function" class="java.lang.String"/>
</subDataset>
<parameter name="title" class="java.lang.String"/>
<parameter name="datasetTable1" class="net.sf.jasperreports.engine.data.JRBeanCollectionDataSource"/>
<queryString>
<![CDATA[]]>
</queryString>
<field name="code" class="java.lang.String"/>
<field name="name" class="java.lang.String"/>
<field name="function" class="java.lang.String"/>
<background>
<band splitType="Stretch"/>
</background>
<title>
<band height="90" splitType="Stretch">
<textField>
<reportElement x="204" y="6" width="147" height="60" uuid="4fc37721-d03e-4f94-9df8-355d2c2ed4e3"/>
<textElement textAlignment="Center">
<font size="26" isBold="true"/>
</textElement>
<textFieldExpression><![CDATA[$P{title}]]></textFieldExpression>
</textField>
</band>
</title>
<pageHeader>
<band height="35" splitType="Stretch"/>
</pageHeader>
<columnHeader>
<band height="61" splitType="Stretch"/>
</columnHeader>
<detail>
<band height="354" splitType="Stretch">
<componentElement>
<reportElement x="72" y="154" width="200" height="200" uuid="99067366-d9e3-48e1-95b3-a4d8c1e8a1db">
<property name="com.jaspersoft.studio.layout" value="com.jaspersoft.studio.editor.layout.VerticalRowLayout"/>
<property name="com.jaspersoft.studio.table.style.table_header" value="Table 1_TH"/>
<property name="com.jaspersoft.studio.table.style.column_header" value="Table 1_CH"/>
<property name="com.jaspersoft.studio.table.style.detail" value="Table 1_TD"/>
</reportElement>
<jr:table xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd" whenNoDataType="AllSectionsNoDetail">
<datasetRun subDataset="Dataset1" uuid="7f03ad97-fa43-4b82-94c5-19a674ac7d7e">
<dataSourceExpression><![CDATA[$P{datasetTable1}]]></dataSourceExpression>
</datasetRun>
<jr:column width="66" uuid="40fb6564-12c3-4174-955c-23d808832359">
<property name="com.jaspersoft.studio.components.table.model.column.name" value="Colonne1"/>
<jr:columnHeader style="Table 1_CH" height="30">
<staticText>
<reportElement x="0" y="0" width="66" height="30" uuid="a6e64620-475b-4cd5-a3f6-d7dd711b2ee2"/>
<text><![CDATA[code]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell style="Table 1_TD" height="30">
<textField>
<reportElement x="0" y="0" width="66" height="30" uuid="a7d15e3a-2452-4f80-8c20-7fbcc8181fe0"/>
<textFieldExpression><![CDATA[$F{code}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="66" uuid="ba0efa7e-7795-4fd2-9b71-b39f9fdcb466">
<property name="com.jaspersoft.studio.components.table.model.column.name" value="Colonne2"/>
<jr:columnHeader style="Table 1_CH" height="30">
<staticText>
<reportElement x="0" y="0" width="66" height="30" uuid="a694b15b-401f-4e8d-a726-ac8e6ddcaf05"/>
<text><![CDATA[name]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell style="Table 1_TD" height="30">
<textField>
<reportElement x="0" y="0" width="66" height="30" uuid="b0fe47b1-8a5c-4df3-8851-6e89da8bfc3a"/>
<textFieldExpression><![CDATA[$F{name}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="66" uuid="d0dc532f-c2e6-4ff4-8b3e-7a8c8ab0a748">
<property name="com.jaspersoft.studio.components.table.model.column.name" value="Colonne3"/>
<jr:columnHeader style="Table 1_CH" height="30">
<staticText>
<reportElement x="0" y="0" width="66" height="30" uuid="32797f1c-a862-4e5f-b624-e1f19af58277"/>
<text><![CDATA[function]]></text>
</staticText>
</jr:columnHeader>
<jr:detailCell style="Table 1_TD" height="30">
<textField>
<reportElement x="0" y="0" width="66" height="30" uuid="ba092f73-109d-4160-b7dc-c664e83366c4"/>
<textFieldExpression><![CDATA[$F{function}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
</jr:table>
</componentElement>
</band>
</detail>
<columnFooter>
<band height="45" splitType="Stretch"/>
</columnFooter>
<pageFooter>
<band height="54" splitType="Stretch"/>
</pageFooter>
<summary>
<band height="42" splitType="Stretch"/>
</summary>
</jasperReport>
the generated PDF:
enter image description here
i can't find where the problem is, can you help me please ?

Answer 1

There are two problems here.
The first is that the name of the parameter in report.data (namely Dataset1) doesn't match the name of the parameter in the report (which is datasetTable1). So you'll need this in the JavaScript code:
var report = {
report: 'hw',
data: {
title: "My test report",
datasetTable1: jasper.toJsonDataSource(
...
Then, the type of the datasetTable1 parameter in the report is net.sf.jasperreports.engine.data.JRBeanCollectionDataSource, while jasper.toJsonDataSource produces a net.sf.jasperreports.engine.data.JsonDataSource object. You need to set the parameter type to JsonDataSource or to a more generic type like this:
<parameter name="datasetTable1" class="net.sf.jasperreports.engine.JRDataSource"/>