246 lines
9.1 KiB
Markdown
246 lines
9.1 KiB
Markdown
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# CBI models
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are Lua files describing the structure of an UCI config file and the resulting HTML form to be evaluated by the CBI parser.<br />
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All CBI model files must return an object of type **luci.cbi.Map**.<br />
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For a commented example of a CBI model, see the [Writing Modules tutorial](ModulesHowTo.md#cbimodels).
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The scope of a CBI model file is automatically extended by the contents of the module **luci.cbi** and the _translate_ function from **luci.i18n**
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This Reference covers **the basics** of the CBI system.
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## class Map (_config, title, description_)
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This is the root object of the model.
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* **config:** configuration filename to be mapped, see [UCI documentation](http://wiki.openwrt.org/doc/uci) and the files in /etc/config
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* **title:** title shown in the UI
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* **description:** description shown in the UI
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#### function :section (_sectionclass_, ...)
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Creates a new section
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* **sectionclass**: a class object of the section
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* _additional parameters passed to the constructor of the section class_
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----
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## class NamedSection (_name, type, title, description_)
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An object describing an UCI section selected by the name.<br />
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To instantiate use: `Map:section(NamedSection, "name", "type", "title", "description")`
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* **name:** UCI section name
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* **type:** UCI section type
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* **title:** The title shown in the UI
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* **description:** description shown in the UI
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#### function :option(_optionclass_, ...)
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Creates a new option
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* **optionclass:** a class object of the section
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* _additional parameters passed to the constructor of the option class_
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#### property .addremove = false
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Allows the user to remove and recreate the configuration section.
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#### property .dynamic = false
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Marks this section as dynamic. Dynamic sections can contain an undefinded number of completely userdefined options.
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#### property .optional = true
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Parse optional options
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----
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## class TypedSection (_type, title, description_)
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An object describing a group of UCI sections selected by their type.<br />
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To instantiate use: `Map:section(TypedSection, "type", "title", "description")`
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* **type:** UCI section type
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* **title:** The title shown in the UI
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* **description:** description shown in the UI
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#### function :option(_optionclass_, ...)
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Creates a new option
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**optionclass:** a class object of the section
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_additional parameters passed to the constructor of the option class_
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#### function :depends(_key, value_)
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Only select those sections where _key == value_ <br />
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If you call this function several times the dependencies will be linked with **"or"**
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#### function .filter(_self, section_) -abstract-
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You can override this function to filter certain sections that will not be parsed.
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The filter function will be called for every section that should be parsed and returns **nil** for sections that should be filtered. For all other sections it should return the section name as given in the second parameter.
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#### property .addremove = false
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Allows the user to remove and recreate the configuration section
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#### property .dynamic = false
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Marks this section as dynamic. Dynamic sections can contain an undefinded number of completely userdefined options.
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#### property .optional = true
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Parse optional options
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#### property .anonymous = false
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Do not show UCI section names
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----
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## class Value (_option, title, description_)
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An object describing an option in a section of a UCI File. Creates a standard text field in the formular.<br />
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To instantiate use: `NamedSection:option(Value, "option", "title", "description")`<br />
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or `TypedSection:option(Value, "option", "title", "description")`
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* **option:** UCI option name
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* **title:** The title shown in the UI
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* **description:** description shown in the UI
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#### function :depends(key, value)
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Only show this option field if another option _key_ is set to _value_ in the same section.<br />
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If you call this function several times the dependencies will be linked with **"or"**
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#### function :value(key, value)
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Convert this text field into a combobox if possible and add a selection option.
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#### property .default = nil
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The default value
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#### property .maxlength = nil
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The maximum inputlength (of chars) of the value
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#### property .optional = false
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Marks this option as optional, implies .rmempty = true
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#### property .rmempty = true
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Removes this option from the configuration file when the user enters an empty value
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#### property .size = nil
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The maximum number of chars displayed by form field
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----
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## class ListValue (_option, title, description_)
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An object describing an option in a section of a UCI File.<br />
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Creates a list box or list of radio (for selecting one of many choices) in the formular.<br />
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To instantiate use: `NamedSection:option(ListValue, "option", "title", "description")`<br />
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or `TypedSection:option(ListValue, "option", "title", "description")`
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* **option:** UCI option name
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* **title:** The title shown in the UI
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* **description:** description shown in the UI
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#### function :depends(key, value)
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Only show this option field if another option _key_ is set to _value_ in the same section.<br />
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If you call this function several times the dependencies will be linked with **"or"**
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#### function :value(_key, value_)
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Adds an entry to the selection list
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#### property .widget = "select"
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**"select"** shows a selction list, **"radio"** shows a list of radio buttons inside form
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#### property .default = nil
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The default value
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#### property .optional = false
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Marks this option as optional, implies .rmempty = true
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#### property .rmempty = true
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Removes this option from the configuration file when the user enters an empty value
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#### property .size = nil
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The size of the form field
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----
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## class Flag (_option, title, description_)
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An object describing an option with two possible values in a section of a UCI File.<br />
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Creates a checkbox field in the formular.<br />
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To instantiate use: `NamedSection:option(Flag, "option", ""title", "description")`<br />
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or `TypedSection:option(Flag, "option", "title", "description")`
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* **option:** UCI option name
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* **title:** The title shown in the UI
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* **description:** description shown in the UI
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#### function :depends (_key, value_)
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Only show this option field if another option _key_ is set to _value_ in the same section.<br />
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If you call this function several times the dependencies will be linked with **"or"**
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#### property .default = nil
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The default value
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#### property .disabled = 0
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the value that should be set if the checkbox is unchecked
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#### property .enabled = 1
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the value that should be set if the checkbox is checked
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#### property .optional = false
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Marks this option as optional, implies .rmempty = true
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#### property .rmempty = true
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Removes this option from the configuration file when the user enters an empty value
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----
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## class MultiValue (_option'', ''title'', ''description_)
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An object describing an option in a section of a UCI File.<br />
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Creates a list of checkboxed or a multiselectable list as form fields.<br />
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To instantiate use: `NamedSection:option(MultiValue, "option", ""title", "description")`<br />
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or `TypedSection:option(MultiValue, "option", "title", "description")`
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* **option:** UCI option name
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* **title:** The title shown in the UI
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* **description:** description shown in the UI
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#### function :depends (_key, value_)
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Only show this option field if another option _key_ is set to _value_ in the same section.<br />
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If you call this function several times the dependencies will be linked with **"or"**
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#### function :value(_key, value_)
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Adds an entry to the list
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#### property .widget = "checkbox"
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**"select"** shows a selction list, **"checkbox"** shows a list of checkboxes inside form
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#### property .delimiter = " "
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The string which will be used to delimit the values inside stored option
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#### property .default = nil
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The default value
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#### property .optional = false
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Marks this option as optional, implies .rmempty = true
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#### property .rmempty = true
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Removes this option from the configuration file when the user enters an empty value
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#### property .size = nil
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The size of the form field (only used if property _.widget = "select"_)
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----
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## class StaticList (_option, title, description_)
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Similar to the MultiValue, but stores selected Values into a UCI list instead of a character-separated option.
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----
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## class DynamicList (_option, title, description_)
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A extensible list of user-defined values. Stores Values into a UCI list
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----
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## class DummyValue (_option, title, description_)
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Creates a readonly text in the form. !It writes no data to UCI!<br />
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To instantiate use: `NamedSection:option(DummyValue, "option", ""title", "description")`<br />
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or `TypedSection:option(DummyValue, "option", "title", "description")`
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* **option:** UCI option name
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* **title:** The title shown in the UI
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* **description:** description shown in the UI
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#### property :depends (_key, value_)
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Only show this option field if another option _key_ is set to _value_ in the same section.<br />
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If you call this function several times the dependencies will be linked with **"or"**
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----
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## class TextValue (_option, title, description_)
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An object describing a multi-line textbox in a section in a non-UCI form.
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----
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## class Button (_option, title, description_)
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An object describing a Button in a section in a non-UCI form.
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