Product page with one product is listed as having many

[ctheiss]

It looks like, sometimes extruct adds product variants to the metadata, and sometimes it doesn't. Here's a page with multiple, differently-priced variants: https://ca.store.ui.com/ca/en/category/cloud-gateways-compact/collections/cloud-gateway-fiber/products/ucg-fiber?variant=uacc-ssd-1tb

and here's the extruct extract:

{'json-ld': [{'@context': 'https://schema.org',
              '@type': 'Product',
              'brand': {'@type': 'Brand', 'name': 'Ubiquiti'},
              'description': 'Desktop 10G Cloud Gateway with integrated 4-port '
                             '2.5 GbE switch, selectable NVR storage, and full '
                             'UniFi application support.',
              'image': {'@type': 'ImageObject',
                        'height': '1500',
                        'url': 'https://cdn.ecomm.ui.com/products/48cf74fa-0456-4c5f-bbcc-c1a1ffdc11f9/5de9e511-3139-41bf-aaa0-29c29f4462d1.png',
                        'width': '1500'},
              'name': 'Cloud Gateway Fiber',
              'offers': {'@type': 'Offer',
                         'availability': 'https://schema.org/OutOfStock',
                         'priceSpecification': {'@type': 'PriceSpecification',
                                                'price': 379,
                                                'priceCurrency': 'CAD',
                                                'valueAddedTaxIncluded': False}},
              'sku': 'UCG-Fiber',
              'url': 'https://ca.store.ui.com/ca/en/products/ucg-fiber'}],
 'microdata': [],
 'opengraph': [{'namespace': {'og': 'http://ogp.me/ns#'},
                'properties': [('og:site_name', 'Ubiquiti Store '),
                               ('og:url',
                                'https://ca.store.ui.com/ca/en/products/ucg-fiber'),
                               ('og:title',
                                'Cloud Gateway Fiber - Ubiquiti Store '),
                               ('og:description',
                                'Desktop 10G Cloud Gateway with integrated '
                                '4-port 2.5 GbE switch, selectable NVR '
                                'storage, and full UniFi application support.'),
                               ('og:type', 'website'),
                               ('og:image',
                                'https://cdn.ecomm.ui.com/products/48cf74fa-0456-4c5f-bbcc-c1a1ffdc11f9/5de9e511-3139-41bf-aaa0-29c29f4462d1.png'),
                               ('og:image:width', '1500'),
                               ('og:image:height', '1500')]}],
 'rdfa': [{'@id': 'https://ca.store.ui.com/ca/en/category/cloud-gateways-compact/collections/cloud-gateway-fiber/products/ucg-fiber?variant=uacc-ssd-1tb',
           'http://ogp.me/ns#description': [{'@value': 'Desktop 10G Cloud '
                                                       'Gateway with '
                                                       'integrated 4-port 2.5 '
                                                       'GbE switch, selectable '
                                                       'NVR storage, and full '
                                                       'UniFi application '
                                                       'support.'}],
           'http://ogp.me/ns#image': [{'@value': 'https://cdn.ecomm.ui.com/products/48cf74fa-0456-4c5f-bbcc-c1a1ffdc11f9/5de9e511-3139-41bf-aaa0-29c29f4462d1.png'}],
           'http://ogp.me/ns#image:height': [{'@value': '1500'}],
           'http://ogp.me/ns#image:width': [{'@value': '1500'}],
           'http://ogp.me/ns#site_name': [{'@value': 'Ubiquiti Store '}],
           'http://ogp.me/ns#title': [{'@value': 'Cloud Gateway Fiber - '
                                                 'Ubiquiti Store '}],
           'http://ogp.me/ns#type': [{'@value': 'website'}],
           'http://ogp.me/ns#url': [{'@value': 'https://ca.store.ui.com/ca/en/products/ucg-fiber'}]}]}

Notice the variants didn't get picked up. Now let's look at https://ca.store.ui.com/ca/en/category/door-access-accessories/products/ua-lock-magnetic?variant=ua-lock-magnetic-270kg

{'json-ld': [{'@context': 'https://schema.org',
              '@type': 'ProductGroup',
              'description': 'Fail-safe magnetic lock for inswing and outswing '
                             'doors that connects to a UniFi Access Hub.',
              'hasVariant': [{'@type': 'Product',
                              'brand': {'@type': 'Brand', 'name': 'Ubiquiti'},
                              'description': 'Fail-safe magnetic lock for '
                                             'inswing and outswing doors that '
                                             'connects to a UniFi Access Hub.',
                              'image': {'@type': 'ImageObject',
                                        'height': '1500',
                                        'url': 'https://cdn.ecomm.ui.com/products/a391617a-790e-4e6a-ab24-c9b63e0e0787/2c728090-bf62-4466-ba76-9e83c9bacfa6.png',
                                        'width': '1500'},
                              'name': 'Access Magnetic Lock / Holds up to 270 '
                                      'kg (600 lb)',
                              'offers': {'@type': 'Offer',
                                         'availability': 'https://schema.org/OutOfStock',
                                         'priceSpecification': {'@type': 'PriceSpecification',
                                                                'price': 199,
                                                                'priceCurrency': 'CAD',
                                                                'valueAddedTaxIncluded': False}},
                              'sku': 'UA-Lock-Magnetic-270kg',
                              'url': 'https://ca.store.ui.com/ca/en/products/ua-lock-magnetic?variant=ua-lock-magnetic-270kg'},
                             {'@type': 'Product',
                              'brand': {'@type': 'Brand', 'name': 'Ubiquiti'},
                              'description': 'Fail-safe magnetic lock for '
                                             'inswing and outswing doors that '
                                             'connects to a UniFi Access Hub.',
                              'image': {'@type': 'ImageObject',
                                        'height': '1500',
                                        'url': 'https://cdn.ecomm.ui.com/products/a391617a-790e-4e6a-ab24-c9b63e0e0787/458d123f-48fa-4e75-9f79-0b8ea3bdab33.png',
                                        'width': '1500'},
                              'name': 'Access Magnetic Lock / Holds up to 540 '
                                      'kg (1200 lb)',
                              'offers': {'@type': 'Offer',
                                         'availability': 'https://schema.org/OutOfStock',
                                         'priceSpecification': {'@type': 'PriceSpecification',
                                                                'price': 269,
                                                                'priceCurrency': 'CAD',
                                                                'valueAddedTaxIncluded': False}},
                              'sku': 'UA-Lock-Magnetic-540kg',
                              'url': 'https://ca.store.ui.com/ca/en/products/ua-lock-magnetic?variant=ua-lock-magnetic-540kg'}],
              'image': {'@type': 'ImageObject',
                        'height': '1500',
                        'url': 'https://cdn.ecomm.ui.com/products/a391617a-790e-4e6a-ab24-c9b63e0e0787/2c728090-bf62-4466-ba76-9e83c9bacfa6.png',
                        'width': '1500'},
              'name': 'Access Magnetic Lock',
              'url': 'https://ca.store.ui.com/ca/en/products/ua-lock-magnetic'}],
 'microdata': [],
 'opengraph': [{'namespace': {'og': 'http://ogp.me/ns#'},
                'properties': [('og:site_name', 'Ubiquiti Store '),
                               ('og:url',
                                'https://ca.store.ui.com/ca/en/products/ua-lock-magnetic'),
                               ('og:title',
                                'Access Magnetic Lock - Ubiquiti Store '),
                               ('og:description',
                                'Fail-safe magnetic lock for inswing and '
                                'outswing doors that connects to a UniFi '
                                'Access Hub.'),
                               ('og:type', 'website'),
                               ('og:image',
                                'https://cdn.ecomm.ui.com/products/a391617a-790e-4e6a-ab24-c9b63e0e0787/2c728090-bf62-4466-ba76-9e83c9bacfa6.png'),
                               ('og:image:width', '1500'),
                               ('og:image:height', '1500')]}],
 'rdfa': [{'@id': 'https://ca.store.ui.com/ca/en/category/door-access-accessories/products/ua-lock-magnetic?variant=ua-lock-magnetic-270kg',
           'http://ogp.me/ns#description': [{'@value': 'Fail-safe magnetic '
                                                       'lock for inswing and '
                                                       'outswing doors that '
                                                       'connects to a UniFi '
                                                       'Access Hub.'}],
           'http://ogp.me/ns#image': [{'@value': 'https://cdn.ecomm.ui.com/products/a391617a-790e-4e6a-ab24-c9b63e0e0787/2c728090-bf62-4466-ba76-9e83c9bacfa6.png'}],
           'http://ogp.me/ns#image:height': [{'@value': '1500'}],
           'http://ogp.me/ns#image:width': [{'@value': '1500'}],
           'http://ogp.me/ns#site_name': [{'@value': 'Ubiquiti Store '}],
           'http://ogp.me/ns#title': [{'@value': 'Access Magnetic Lock - '
                                                 'Ubiquiti Store '}],
           'http://ogp.me/ns#type': [{'@value': 'website'}],
           'http://ogp.me/ns#url': [{'@value': 'https://ca.store.ui.com/ca/en/products/ua-lock-magnetic'}]}]}

Both variants were picked up (even though the page structure is identical!), and with two prices, the whole processor errors out.

changedetection.io/changedetectionio/processors/restock_diff/processor.py

Line 95 in f57bc10

raise MoreThanOnePriceFound()

Since the exact mechanations of extruct is outside the scope of changedetection.io, I believe it would be more correct to log a warning and just use the first price.