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73 lines
3.1 KiB
Markdown
73 lines
3.1 KiB
Markdown
# Configuring Blog for large user bases
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By default the blog module user and author selection form fields include all users in your website as
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candidates for writers, editors and contributors. Additionally, when adding a blog post, again all users are selectable.
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This can cause issue with websites that store a large number of users in the database.
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In this case you may need to restrict the number of user accounts that are elegable to be selected.
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The module has some useful configuration options for this that can be added to your projects config.yml
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## Restricting blog managers to a permission setting
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Default is to list all users and when one is selected, they are added to a `blog-users` group with `CMS_ACCESS_CMSMain` permissions.
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To only include those already having these permissions you can set in your `config.yml`:
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```yaml
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Blog:
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grant_user_access: false
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```
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Note: depending on the incusion order of your config.yml you may need to clear the condifg setting
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before updating it. In this case use the folling in yout `mysite/_config.php`:
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```php
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Config::inst()->remove('Blog', 'grant_user_access');
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```
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If you create your own permission and want to ensure the pool of possible selectable users includes
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those with this permission you can set the checked permission in `config.yml` with:
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```yaml
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Blog:
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grant_user_permission: SOME_PERMISSION_here
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```
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## Restricting blog post authors selection to a known group
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In a blog post when selecting an author it will default to you (the logged in person creating the post),
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however you may be posting on behalf of another person. In this case the slection form field will offer
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all users as potential blog authors. Again for large websites with many thousands of users this can cause
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the site to be slow or non-responsive. We can turn on a filter so that authors need to be in a defined
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user group to be able to be selected as an author.
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Enable this in your `config.yml` by adding a group code:
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```yaml
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BlogPost:
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restrict_authors_to_group: 'group_code'
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```
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## Extension points in Blog and BlogPost users and how to use
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Both Blog and BlogPost have methods which return the list of candidate users or authors. If the previously
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mentioned mothods of reducing this list are not suitable or you wish to roll your own, you can utilise a
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DataExtension to get the controll you require.
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For example in BlogPost:
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```php
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protected function getCandidateAuthors() {
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if($this->config()->get('restrict_authors_to_group')) {
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return Group::get()->filter('Code', $this->config()->get('restrict_authors_to_group'))->first()->Members();
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} else {
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$list = Member::get();
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$this->extend('updateCandidateAuthors', $list);
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return $list;
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}
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}
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```
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Note the line `$this->extend('updateCandidateAuthors', $list);` which allows you to call a
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`updateCandidateAuthors` method in a DataExtension to the Blog Post class if you have not set a `restrict_authors_to_group` config, further filter the passed
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in Member list before it gets sent back to the form field.
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See the documentation on [DataExtension](https://docs.silverstripe.org/en/developer_guides/extending/extensions/) for further implementation notes.
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