如何使区块仅对管理者和教师可见? [英] How to make a block visible only for admin and teacher in moodle?

问题描述

我认为有多种方法可以使学生看不见积木.

I think there are more than one way to make block invisible for students.

1.

Hide the block

2.

Assign role to block and set permission to block

但是这些是由管理员通过更改设置来完成的.我需要一种通过代码的方式.我该如何编写代码以使该块对学生不可见.

But these are done by admin by change the settings. I need a way by code. How can I write the code to make the block invisible for student.

对于activity I can make invisible the activity，通过更改 db/access.php

 'mod/questionbank:view' => array(
        'captype' => 'read',
        'contextlevel' => CONTEXT_MODULE,
        'legacy' => array(
            //'guest' => CAP_ALLOW,
            //'student' => CAP_ALLOW,
            'teacher' => CAP_ALLOW,
            'editingteacher' => CAP_ALLOW,
            'admin' => CAP_ALLOW
        )
    ),

像这样如何通过代码使学生看不见该区块.

编辑

根据 Davosmith的答案.

我放入了get_content函数

if (!has_capability('blocks/blockname:view')) {
        return null;
        }

在 blocks/blockname/block_blockname.php

，并且在我的 blocks/blockname/db/access.php 中包含:

'blocks/blockname:view' => array(
        'captype' => 'read',
        'contextlevel' => CONTEXT_BLOCK,
        'legacy' => array(
            //'guest' => CAP_ALLOW,
            //'student' => CAP_ALLOW,
            'teacher' => CAP_ALLOW,
           // 'editingteacher' => CAP_ALLOW,
            'manager' => CAP_ALLOW
        )
    ),

但这会导致错误页面说

检测到编码错误，必须由程序员修复:PHP可捕获 致命错误

Coding error detected, it must be fixed by a programmer: PHP catchable fatal error

推荐答案

对于任何块，如果get_contents返回null(并且已关闭编辑)，则不会显示该块.

For any block, if get_contents returns null (and editing is off), the block will not be displayed.

因此，将以下内容放入您块的get_content函数中(但要放入您在db/access.php中定义的实际功能):

So, put the following in the get_content function of your block (but put in a real capability that you define in db/access.php):

if (!has_capability('block/myblock:somecapability', $this->context)) {
    return null;
}

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