oliverdavies.uk/content/node.898e3ece-caad-49b2-8486-400e653eea9d.json

{
    "uuid": [
        {
            "value": "898e3ece-caad-49b2-8486-400e653eea9d"
        }
    ],
    "langcode": [
        {
            "value": "en"
        }
    ],
    "type": [
        {
            "target_id": "daily_email",
            "target_type": "node_type",
            "target_uuid": "8bde1f2f-eef9-4f2d-ae9c-96921f8193d7"
        }
    ],
    "revision_timestamp": [
        {
            "value": "2025-05-11T09:00:30+00:00"
        }
    ],
    "revision_uid": [
        {
            "target_type": "user",
            "target_uuid": "b8966985-d4b2-42a7-a319-2e94ccfbb849"
        }
    ],
    "revision_log": [],
    "status": [
        {
            "value": true
        }
    ],
    "uid": [
        {
            "target_type": "user",
            "target_uuid": "b8966985-d4b2-42a7-a319-2e94ccfbb849"
        }
    ],
    "title": [
        {
            "value": "Business logic in template files?\n"
        }
    ],
    "created": [
        {
            "value": "2023-10-12T00:00:00+00:00"
        }
    ],
    "changed": [
        {
            "value": "2025-05-11T09:00:30+00:00"
        }
    ],
    "promote": [
        {
            "value": false
        }
    ],
    "sticky": [
        {
            "value": false
        }
    ],
    "default_langcode": [
        {
            "value": true
        }
    ],
    "revision_translation_affected": [
        {
            "value": true
        }
    ],
    "path": [
        {
            "alias": "\/daily\/2023\/10\/12\/business-logic-in-template-files",
            "langcode": "en"
        }
    ],
    "body": [
        {
            "value": "\n          <p>I've often heard and advocated for not \"putting logic\" in template files and having a separation of concerns.<\/p>\n\n<p>The templates should be as simple to read and change as possible, and any complicated logic should be moved elsewhere.<\/p>\n\n<p>There can be presentational logic - such as a simple if condition to determine if a value should be shown or looping over a list of items, but business logic should be within custom code - ideally within Service, Action or Command classes - and injected into the templates.<\/p>\n\n<p>As well as making the templates simpler and cleaner, this logic can be tested separately with automated tests to ensure it works as expected. If the logic is within a template, this can be done for some things using Functional tests, such as whether some text appears on a page, but testing whether it appears in a certain order, for example, is much harder. This is best done within kernel or unit tests.<\/p>\n\n<p>As well as being more testable, extracting the logic from a template makes it more reusable. You can use a service from multiple places within your website without duplicating it, making your website code smaller and easier to maintain.<\/p>\n\n        ",
            "format": "full_html",
            "processed": "\n          <p>I've often heard and advocated for not \"putting logic\" in template files and having a separation of concerns.<\/p>\n\n<p>The templates should be as simple to read and change as possible, and any complicated logic should be moved elsewhere.<\/p>\n\n<p>There can be presentational logic - such as a simple if condition to determine if a value should be shown or looping over a list of items, but business logic should be within custom code - ideally within Service, Action or Command classes - and injected into the templates.<\/p>\n\n<p>As well as making the templates simpler and cleaner, this logic can be tested separately with automated tests to ensure it works as expected. If the logic is within a template, this can be done for some things using Functional tests, such as whether some text appears on a page, but testing whether it appears in a certain order, for example, is much harder. This is best done within kernel or unit tests.<\/p>\n\n<p>As well as being more testable, extracting the logic from a template makes it more reusable. You can use a service from multiple places within your website without duplicating it, making your website code smaller and easier to maintain.<\/p>\n\n        ",
            "summary": null
        }
    ]
}