modx资料笔记

1、专用术语
  chunks：一段可以重复利用的语句，相当于手机中的“范文”，可以用在正文或模板中。典型例子是把姓名、住址等存为一个chunks，然后在模板的不同地方引用它。
   引用形式为：{{MyChunk}}

  Snippets：有一定输出的小PHP程序片段。在模板、正文、甚至是chunks中被引用并运行。

2、模板要规划好所有的东西，包括页眉和页脚，模板不定义的东西不会显示出来。

3、后台文件树和正文中的分隔线位置是可以调节的，也可以在管理中定义它的大小。

4、文件树中可以用快捷菜单（文件树在英文中称为Manager）。

5、图片文件和pdf（包括其它文本文件，可以定义）文件必须传到/assets/中相应的目录。

6、最左上方有“清除缓存”按钮。

7、在内容方面，modx用tag来简单定义内容。[content]被插入到[document]中的时候，document不用考虑content是如何定义的。（这样便于内容间的相互独立。）
   tag示例：

• [[snippet]] or [!snippet!] for non-caching snippets Inserts the output of a snippet named 'snippet' into your page.（这一个也是snippet的引用方式，是不缓存的）。
  
• [(setting)] Inserts the value of a site-wide setting named 'setting' into your page.
• [*resourceField/TV*] Inserts various blocks of content specific to the page being displayed.
• [^timing^] Shows how long it took to create the current page.
• [~link~] Makes a link to another document in your MODx site.
• chunk Inserts a chunk of HTML into your page.
• [+placeholder+] Acts as a placeholder for content generated by a snippet. Usually used in a chunk specified in an argument of the snippet to format the snippet's output.

8、

There are several timing tags in MODx:

• [^qt^] - Query Time - Shows how long MODx took talking to the database
• [^q^] - Query Count -Shows how many database queries MODx made
• [^p^] - Parse Time - Shows how long MODx took to parse the page
• [^t^] - Total Time - Shows the total time taken to parse/ render the page
• [^s^] - Source - Shows the source of page, whether is database or cache.

9、[₁₂₃] 表示id为123的文档，[(site_start)]表示网站的url。

10、Placeholders：占位符，+name+，+title+，可以用在模板的任何位置。

11、常用的文档模板变量，可以用$modx->documentObject['varialbe-name']来显示出来：

• id - The document's ID. Can also be obtained with $modx->documentIdentifier.
• type - Whether document, folder or weblink.
• contentType - The content type, such as text/html.
• pagetitle - The title of the page.
• longtitle - The longtitle of the page.
• description - The description of the page.
• alias - The alias of the page. Used in creating Friendly URLs.
• published - [0|1] Whether or not the document is published.
• pub_date- Date the document is to be published. This is not a "normal" date, and must be processed by a script for meaningful output. Example: strftime("%d/%m/%y %H:%M:%S", $value)
• unpub_date - Date the document is to be unpublished. See 'pub_date'.
• parent - The ID of the document's parent.
• isfolder - [0|1] Whether or not the document is a folder.
• introtext - The summary of the document.
• content - The content of the document.
• richtext - [0|1] Whether or not a RichText Editor is to be used when editing the document.
• template - The ID of the template to used for the document.
• menuindex - The order in which the document is to be listed in the menu.
• searchable - [0|1] Whether or not the document is to be searchable.
• cacheable - [0|1] Whether or not the document is to be cached.
• createdby - The user ID of the creator of the document.
• createdon - The date the document was created. See 'pub_date'.
• editedby - The ID of the user who last edited the document.
• editedon - The date the document was last edited. See 'pub_date'.
• deleted - [0|1] Whether or not the document has been deleted (but not yet completely removed from the database by emptying the trash).
• deletedon - The date the document was deleted. See 'pub_date'.
• deletedby - The ID of the user who deleted the document.
• menutitle - The title to be shown in the menu. If empty, the pagetitle is used.
• donthit - [0|1] Disable page hit count for the document.
• haskeywords - [0|1] Whether or not the document has links to keywords.
• hasmetatags - [0|1] Whether or not the document has links to meta tags
• privateweb - [0|1] Whether or not this document has been assigned to a private web document group.
• privatemgr - [0|1] Whether or not this document has been assigned to a private manager document group.
• content_dispo - [0|1] Whether the document's content-disposition is attachment or inline.
• hidemenu - [0|1] Whether or not the document is to be hidden in the menu.

12、编辑文件时注意parent的作用。

13、Template Variables（TVs），常用的有：

• [*pagetitle*] - the title of the document
• [*longtitle*] - the long title of the document
• [*introtext*] - the summary of the document
• [*content*] - the content of the document

14、资源字段。用 [*resource-field-name*] 来引用，实际上用$modx->documentObject['resource-field-name']来返回。

• id - The document's ID. Can also be obtained with $modx->documentIdentifier.
• type - Whether document, folder or weblink.
• contentType - The content type, such as text/html.
• pagetitle - The title of the page.
• longtitle - The longtitle of the page.
• description - The description of the page.
• alias - The alias of the page. Used in creating Friendly URLs.
• link_attributes - The Link Attributes of the page, eg. rel=, target= etc.
• published - [0|1] Whether or not the document is published.
• pub_date- Date the document is to be published. This is not a "normal" date, and must be processed by a script for meaningful output.
• unpub_date - Date the document is to be unpublished. See 'pub_date'.
• parent - The ID of the document's parent.
• isfolder - [0|1] Whether or not the document is a folder.
• introtext - The summary of the document.
• content - The content of the document.
• richtext - [0|1] Whether or not a RichText Editor is to be used when editing the document.
• template - The ID of the template to used for the document.
• menuindex - The order in which the document is to be listed in the menu.
• searchable - [0|1] Whether or not the document is to be searchable.
• cacheable - [0|1] Whether or not the document is to be cached.
• createdby - The user ID of the creator of the document.
• createdon - The date the document was created. See .
• editedby - The ID of the user who last edited the document.
• editedon - The date the document was last edited. See .
• deleted - [0|1] Whether or not the document has been deleted (but not yet completely removed from the database by emptying the trash).
• deletedon - The date the document was deleted. See .
• deletedby - The ID of the user who deleted the document.
• menutitle - The title to be shown in the menu. If empty, the pagetitle is used.
• donthit - [0|1] Disable page hit count for the document.
• haskeywords - [0|1] Whether or not the document has links to keywords.
• hasmetatags - [0|1] Whether or not the document has links to meta tags
• privateweb - [0|1] Whether or not this document has been assigned to a private web document group.
• privatemgr - [0|1] Whether or not this document has been assigned to a private manager document group.
• content_dispo - [0|1] Whether the document's content-disposition is attachment or inline.
• hidemenu - [0|1] Whether or not the document is to be hidden in the menu.

   注意：pub_date，要用strftime("%d/%m/%y %H:%M:%S", $value)来转为可读的形式。

15、snippets：
    常用来实现一些动态的内容，比如查询数据库、引用session变量等，它的好处是放到模板中不影响模板的布局。
   snippets是存储在数据库中的，但是某些复杂的snippets可能会用一些使文件来辅助。这些文件在 /assets/snippets中都有自己专用的目录。但是大多数的snippets都不会出现在文件系统中。
   一些snippets在安装系统的时候有个安装提示，如果你选择了安装，那么它们已经可以使用了。
   安装snippets也很简单，只要在“资源”中找到“代码片断”，然后把snippets的代码复制到里面就可以了。名称可以随便取，但是你要记住，否则做模板的时候可能会有一些麻烦。对于有辅助文件的snippets，把它上传到/assets/snippets新建的文件夹中，新建的文件夹注意用小写，最好保持最原始的文件夹名。
   [[SnippetName]] or [!SnippetName!]的区别：前者是缓存的，后者是不缓存的。例如登录snippet，就必须用不缓存的。
   snippets可以用html的参数方式来传递参数：?aa=bb&cc=dd

16、用户相关的几个概念：
   Document：modx最基本的元素，是一个资源。
   Documnet group：文档组，一个文档可以属于不同的文档组，一个文档组可以与一个或多个用户组相关联。
   user：用户仅仅是用户名、密码等集合，用户的活动范围受权限的控制，权限控制通过“角色”来实现。一个用户可以属于不同的“用户组”，但是只能属于一种“角色”。
   User group：用户组，需要访问同一个“文档组”的同一类用户，注意“文档组”。一个用户组与一个或多个“文档组”相关联。
   “角色”用来控制一个用户的权限，用户组和文档组的组合用来控制用户可以工作于哪些文档。
   “角色”决定了用户“可以干什么”，而“用户组”决定了“可以做哪些文档”。用户组可以做的文档，角色用来指定可以进行哪些操作。


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18、超强的