Association Model and Infinitus Classification_PHP Tutorial

Today’s summary:
Association Model
ONE_TO_ONE : HAS_ONE&BELONGS_TO
ONE_TO_MANY : HAS_MANY&BELONGS_TO
MANY_TO_MANY

First, define the model class headed by the table name on the model side. Integrate the associated model class
Define protected variables in the class $_link = array(); which is the mapping method of the fields;
For example: the user table is mapped to archive to hasone mapping method, or one-to-one can also use belongsto
dept is belongsto mapping method
grp is manytomany mapping method
The default manytomany mode intermediate table name should be defined as operation indication_target table name
You can also set the value of relationship_table for initialization
hasone instantiates the object, sets the relation() parameter to a true value, and calls the object relational mapping method to add, delete, modify and check

After the associated model object is added, deleted, modified and checked, the only corresponding field associated with it will be changed

Autofill~Complete unlimited classification

Instantiate the object in the active segment. Call the field method. The parameters include the concat method parameter, which contains the path connector - id as bpath, and call the order method parameter of the coherent operation as bpath, and the select method of the object-relational mapping. foreache traverses the multiple pieces of data obtained above and adds a new field count to each piece. The count method parameter is the explode method parameter is the connector - the bpath field, so that each record adds a count field equal to its own path length. Let Then call the assign method under ￥this to assign the value and call the display method to display.
On the view side, the form submission direction is add activity. Call the volist tag so that the value of the option tag is {$vo['id']}. Use the php tag within the volist tag to perform a for loop and output spaces. Output the name value outside the php tag
Set the automatically completed value on the custom model side to array. Set the path field to the callback function tclm to fill in the column. Define the function tclm. Set the pid to the passed pid. If not, assign it to 0. If it is 0, return 0. The query id is The entry setting of pid returns the data as the path connection of the parent item - just connect the id of the parent item