Currently, the error arises due to adding an unpublished product to wishlist for multiple times.

Steps to reproduce:

- Install a 'website_sale_wishlist' module (with demo data).
- Open a website and go to the shop.
-  Add an unpublished product to the wishlist, then refresh the webpage and again try to add that unpublished product to the wishlist, An error is generated in the backend.

```
UniqueViolation: duplicate key value violates unique constraint "product_wishlist_product_unique_partner_id"
DETAIL:  Key (product_id, partner_id)=(2, 3) already exists.

  File "odoo/service/model.py", line 134, in retrying
    result = func()
  File "odoo/http.py", line 1824, in _serve_ir_http
    return self._serve_ir_http(rule, args)
  File "odoo/http.py", line 1832, in _serve_ir_http
    response = self.dispatcher.dispatch(rule.endpoint, args)
  File "odoo/http.py", line 2057, in dispatch
    result = self.request.registry['ir.http']._dispatch(endpoint)
  File "odoo/addons/base/models/ir_http.py", line 222, in _dispatch
    result = endpoint(**request.params)
  File "odoo/http.py", line 740, in route_wrapper
    result = endpoint(self, *args, **params_ok)
  File "addons/website_sale_wishlist/controllers/main.py", line 25, in add_to_wishlist
    wish = Wishlist._add_to_wishlist(
  File "addons/website_sale_wishlist/models/product_wishlist.py", line 44, in _add_to_wishlist
    wish = self.env['product.wishlist'].create({
  File "<decorator-gen-30>", line 2, in create
  File "odoo/api.py", line 420, in _model_create_multi
    return create(self, [arg])
  File "odoo/models.py", line 4716, in create
    records = self._create(data_list)
  File "odoo/models.py", line 4904, in _create
    cr.execute(SQL(
  File "odoo/sql_db.py", line 346, in execute
    res = self._obj.execute(query, params)
TypeError: 'NoneType' object is not subscriptable
  File "odoo/http.py", line 2251, in __call__
    response = request._serve_db()
  File "odoo/http.py", line 1826, in _serve_db
    return self._transactioning(_serve_ir_http, readonly=ro)
  File "odoo/http.py", line 1847, in _transactioning
    return service_model.retrying(func, env=self.env)
  File "odoo/service/model.py", line 153, in retrying
    raise _as_validation_error(env, exc) from exc
  File "odoo/service/model.py", line 112, in _as_validation_error
    translate_sql_constraint(env.cr, exc.diag.constraint_name, env.context.get('lang', 'en_US'))
  File "odoo/tools/translate.py", line 429, in translate_sql_constraint
    return cr.fetchone()[0]

```

An issue arises when clicking on the 'add to wishlist' icon for unpublished products. After refreshing the webpage, the 'add to wishlist' icon remains enabled, allowing users to add the same unpublished product to their wishlist multiple times. Consequently, duplicate records are inserted into the 'product_wishlist' table, An issue arises due to this.

To resolve this issue, the 'Add wishlist' button is now disabled for unpublished products.

sentry-5065439065

---
I confirm I have signed the CLA and read the PR guidelines at www.odoo.com/submit-pr

Currently, an error occurs when adding a deadline interval date to a task.

Step to produce:

- Install the `industry_fsm` module and turn on the debugger.
- Go to Settings / Technical / Resource / Resources, open record name 'Mitchell admin' and remove the value of  'Working Time'.
- Go to Project / Tasks / My tasks, Create a task with Deadline intervals, Make sure Assignees is a  'Mitchell admin' as we removed the value of 'Working Time' from it

Traceback On Sentry:

```
ValueError: not enough values to unpack (expected 1, got 0)
  File "odoo/models.py", line 5851, in ensure_one
    _id, = self._ids
ValueError: Expected singleton: resource.calendar()
  File "odoo/http.py", line 2248, in __call__
    response = request._serve_db()
  File "odoo/http.py", line 1823, in _serve_db
    return self._transactioning(_serve_ir_http, readonly=ro)
  File "odoo/http.py", line 1843, in _transactioning
    return service_model.retrying(func, env=self.env)
  File "odoo/service/model.py", line 134, in retrying
    result = func()
  File "odoo/http.py", line 1821, in _serve_ir_http
    return self._serve_ir_http(rule, args)
  File "odoo/http.py", line 1828, in _serve_ir_http
    response = self.dispatcher.dispatch(rule.endpoint, args)
  File "odoo/http.py", line 2053, in dispatch
    result = self.request.registry['ir.http']._dispatch(endpoint)
  File "odoo/addons/base/models/ir_http.py", line 220, in _dispatch
    result = endpoint(**request.params)
  File "odoo/http.py", line 756, in route_wrapper
    result = endpoint(self, *args, **params_ok)
  File "addons/web/controllers/dataset.py", line 38, in call_kw
    return self._call_kw(model, method, args, kwargs)
  File "addons/web/controllers/dataset.py", line 34, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "odoo/api.py", line 458, in call_kw
    result = getattr(recs, name)(*args, **kwargs)
  File "addons/web/models/models.py", line 71, in web_save
    self.write(vals)
  File "home/odoo/src/enterprise/saas-17.2/helpdesk_fsm/models/project_task.py", line 45, in write
    res = super().write(vals)
  File "home/odoo/src/enterprise/saas-17.2/industry_fsm/models/project_task.py", line 193, in write
    return super(Task, self_fsm).write(vals)
  File "addons/project_sms/models/project_task.py", line 25, in write
    res = super().write(vals)
  File "home/odoo/src/enterprise/saas-17.2/project_enterprise/models/project_task.py", line 472, in write
    work_intervals = calendar._work_intervals_batch(start, stop, resources=resource)
  File "addons/resource/models/resource_calendar.py", line 434, in _work_intervals_batch
    attendance_intervals = self._attendance_intervals_batch(start_dt, end_dt, resources, tz=tz or self.env.context.get("employee_timezone"))
  File "addons/resource/models/resource_calendar.py", line 273, in _attendance_intervals_batch
    self.ensure_one()
  File "odoo/models.py", line 5854, in ensure_one
    raise ValueError("Expected singleton: %s" % self)

```

An error occurs when the system tries to access the method name '_work_intervals_batch' without a resource calendar record at [1].

link [1]: https://github.com/odoo/enterprise/blob/4a09f71c13f26dd538603c1fdbb34da7bc0d2a97/project_enterprise/models/project_task.py#L470-L472

To resolve this issue, Add a condition that checks if the resource calendar_id is not available, then try to plan tasks for a user that has no calendar.

sentry - 5534568281