php - codeigniter - what if I don't have any model? -

-

it's first time i'm using php framework , have question regarding design pattern.

let's i'm trying build php app has contact page (which ask name, email address comment etc , once submitted use mail function send email admin). know view gonna be, use controller render view, should model? i'm not going load database or save database. in case should skip model?

the gritty details go in model. simple contact form has lots of gritty specific details: names of fields, specific validation rules, etc.

the controller boss - validate form! it not how validate it, , doesn't need details of each field in form. if form validates - controller calls next view. if not validate - controller shows form again , maybe passes specific error messages.

  • the validation details contact form - put in model.

  • the emailing of form: content of email, taking form values , putting email, email goes to, details of sending email - work model.

what gain us? when client calls in year , says - change text in email - won't hunting through bunch of controller code. @ model names , know go. separation of concerns not building - inevitable changes happen on time.

edit

yes business logic should in model. contact form business rules might - ask name , address - , require email address , phone number. validation rules fulfill business rules.

then 6 months later client calls , says - people don't requiring phone number - make email required. have put validation rules in model - therefore specific model needs change. controller not change @ all! , since separated form validation rules sending of email separate models - if make mistake when changing validation rule - less code through , debug.

the other way @ - how specific , 'granular' method? more specific is, further controller should be. controller methods should change because of changes business rules.

so when said controller orders "validate form" - meant controller calling validation method in model, , getting true or false, no matter changes happen form on time.


Comments

Post a Comment

Popular posts from this blog

c# - How Configure Devart dotConnect for SQLite Code First? -

-
can configure following sample code ? when run following code, error : no entity framework provider found ado.net provider invariant name 'devart.data.sqlite' setting in machine.config <system.data> <dbproviderfactories> <add name="dotconnect sqlite" invariant="devart.data.sqlite" description="devart dotconnect sqlite" type="devart.data.sqlite.sqliteproviderfactory, devart.data.sqlite, version=4.6.287.0, culture=neutral, publickeytoken=09af7300eec23701" /> </dbproviderfactories> </system.data> after add below block code in app.config <?xml version="1.0"?> <configuration>   <configsections> <!-- more information on entity framework configuration, visit http://go.microsoft.com/fwlink/?linkid=237468 --> <section name="entityframework" type="system.data.entity.internal.configfile.entityframeworksection, entit...
Read more

java - Copying object fields -

-
what best way of copying classes when need have 2 independent variables? have simple class: public class myclass { boolean = false; string b= "not empty"; } do need make method : assign(myclass data ) { a= data.a; b= data.b; } is there automatic method copy (duplicate) objects in java? do need make method : pretty close. instead of making method, should make constructor. such constructors called copy constructor , , create them this: myclass(myclass data) { = data.a; b = data.b; } and create copy of instance, use constructor this: myclass obj1 = new myclass(); myclass obj2 = new myclass(obj1); copy constructor can tedious : using copy constructor create deep-copy can tedious, when class has mutable fields. in case, assignment create copy of reference, , not object itself. have create copy of fields (if want deep copy). can go recursive. a better way create deep copy serialize , deserialize object. why not use clone()? ...
Read more

c++ - Clear the memory after returning a vector in a function -

-
i have function processes , stores lot of data in , returns results vector of class. amount of data stored in function tremendous , want clear storage memory of function after finished job. necessary (does function automatically clear memory) or should clear memory function? update: vector<customers> process(char* const *filename, vector<int> id) { vector<customers> list_of_customers; (perform actions) return list_of_customers; } variables defined locally within function automatically released @ end of function scope. destructors objects called, should free memory allocated objects (if objects coded correctly). example of such object std::vector . anything you've allocated new must have corresponding delete release storage. try avoid doing own allocation , use raii instead, i.e. containers or smart pointers.
Read more