Odoo Custom Report With Wizards

report.xml

<odoo>
    <report id="example_report"
            model="example.report.wizard"
            string="Example (PDF)"
            report_type="qweb-pdf"
            name="your_module.example_report_view"
            menu="False"/>

    <template id="example_report_view">
        <t t-call="web.html_container">
            <t t-call="web.external_layout">
                <div class="page">
                    <br/>
                    <h2 class="text-center" style="border: 1px solid lightgray; padding: 10px 10px;">
                        <span>Example Title</span>
                    </h2>
                    <br/>
                    
                    <table class="table table-bordered table-sm text-center">
                        <thead class="thead-light">
                            <tr>
                                <th scope="col">First Column</th>
                            </tr>
                        </thead>
                        <tbody class="sale_tbody">
                            <t t-foreach="docs" t-as="doc">
                                <tr>
                                  <th scope="col">First Data in Column</th>
                                </tr>
                            </t>
                        </tbody>
                    </table>
                </div>
            </t>
        </t>
    </template>

</odoo>

wizard.py

from datetime import datetime, timedelta

from odoo import models, fields, api
from odoo.exceptions import ValidationError

class ExampleReportWizard(models.TransientModel):
    _name = 'example.report.wizard'

    start_date = fields.Date(required=True,default=fields.Date.today())
    end_date = fields.Date()

    def get_report(self):
        """Call when button 'Get Report' clicked.
        """

        sort = "id"
      
        domain = [
            ('partner_id', '!=', False),
            ('date','>=', str(self.start_date))
        ]
        
        lines = self.env['account.move.line'].search(domain,order=sort)

        docs = []
        
        for line in lines:

            docs.append({
                'partner': line.partner_id.name or False,
            })
                
        data = {
            'doc_ids': self.ids,
            'doc_model': self._name,
            'docs': docs,
        }
        
        # use `module_name.report_id` as reference.
        # `report_action()` will call `get_report_values()` and pass `data` automatically.
        return self.env.ref('your_module.example_report').report_action(self, data=data)

class ReportExampleWizard(models.AbstractModel):
    """Abstract Model for report template.
    for `_name` model, please use `report.` as prefix then add `module_name.report_name`.
    """

    _name = 'report.your_module.example_report_view'

    @api.model
    def _get_report_values(self, docids, data=None):
        return data

wizard.xml

<odoo>
    <data>
        <record model="ir.ui.view" id="partner_report_wizard">
            <field name="name">Partner Report</field>
            <field name="model">partner.report.wizard</field>
            <field name="type">form</field>
            <field name="arch" type="xml">
                <form string="Partner Report">
                    <group>
                        <group>
                            <field name="start_date"/>
                            <field name="end_date"/>
                        </group>
                    </group>
                    <footer>
                        <button name="get_report" string="Print Report" type="object" class="oe_highlight"/>
                        <button string="Cancel" special="cancel"/>
                    </footer>
                </form>
            </field>
        </record>

        <act_window id="action_example_report_wizard"
                    name="Example Report"
                    res_model="example.report.wizard"
                    view_mode="form"
                    target="new"/>

        <menuitem id="example_wizard_menu" name="Example (PDF)" sequence="3" parent="your_parent_menu" action="action_example_report_wizard"/>
    </data>
</odoo>