[11.0][ADD] base_cron_oneshot

base_cron_oneshot/__init__.py

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+from . import models

base_cron_oneshot/__manifest__.py

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+# Copyright (C) 2018 by Camptocamp
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+{
+    'name': """Single use crons""",
+    'summary': """Allows creating of single-use disposable crons""",
+    'category': "Extra Tools",
+    'version': "11.0.1.0.0",
+
+    'author': "Camptocamp SA, "
+              "Odoo Community Association (OCA)",
+    'website': "https://github.com/OCA/server-tools",
+    'license': "AGPL-3",
+
+    'data': [
+        'views/ir_cron.xml',
+        'data/ir_sequence.xml',
+    ],
+}

base_cron_oneshot/data/ir_sequence.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo noupdate="1">
+
+  <record id="seq_oneshot_name" model="ir.sequence">
+    <field name="name">Oneshot cron names sequence</field>
+  </record>
+
+</odoo>

base_cron_oneshot/models/__init__.py

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+from . import ir_cron

base_cron_oneshot/models/ir_cron.py

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+# Copyright (C) 2018 by Camptocamp
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+from odoo import api, fields, models
+
+
+class IrCron(models.Model):
+    _inherit = 'ir.cron'
+
+    oneshot = fields.Boolean(
+        string='Single use',
+        default=False,
+    )
+
+    @api.model
+    def create(self, vals):
+        if vals.get('oneshot'):
+            # quite silent - fail loudly if vals['numbercall'] is given?
+            vals['numbercall'] = 1
+        return super(IrCron, self).create(vals)
+
+    @classmethod
+    def _process_job(cls, job_cr, job, cron_cr):
+        res = super(IrCron, cls)._process_job(job_cr, job, cron_cr)
+        try:
+            with api.Environment.manage():
+                cron = api.Environment(job_cr, job['user_id'], {})[cls._name]
+                if job.get('oneshot'):
+                    # log this?
+                    cron.browse(job.get('id')).unlink()
+        finally:
+            job_cr.commit()
+            cron_cr.commit()
+        return res
+
+    @api.model
+    def schedule_oneshot(
+            self, model=False, method=False, params=False, code=False):
+        # XXX: still under construction.
+        if not model:
+            # generic case, use `base` cause we don't really care
+            model = self.env.ref('base.model_base').id
+        if not isinstance(model, str):
+            model = model.id
+        if method and not code:
+            code = 'model.{method}'.format(**locals())
+        oneshot_name_seq = self.env.ref('base_cron_oneshot.seq_oneshot_name')
+        self.create({
+            'name': 'Oneshot #{}'.format(oneshot_name_seq.next()),
+            # TODO: retrieve actual ID of a model
+            'model_id': model.id,
+            'code': code,
+        })

base_cron_oneshot/views/ir_cron.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+
+  <record id="ir_cron_view_form" model="ir.ui.view">
+    <field name="name">ir.cron.form</field>
+    <field name="model">ir.cron</field>
+    <field name="inherit_id" ref="base.ir_cron_view_form"/>
+    <field name="arch" type="xml">
+      <field name="state" position="after">
+        <field name="oneshot"/>
+      </field>
+      <field name="numbercall" position="attributes">
+        <attribute name="attrs">
+          {'invisible': [('oneshot', '=', True)]}
+        </attribute>
+      </field>
+    </field>
+  </record>
+
+</odoo>