I'm writing a plugin which includes a behavior that has a dependency on the ContainableBehavior. In my behavior, I'd like to tweak any query conditions in its beforeFind() callback, but I'm finding that ContainableBehavior::beforeFind() has already been executed so my changes of course are falling on deaf ears, so to speak.
The only solution, as far as I can tell, is to manually change the behavior execution order so that my behavior's beforeFind() method is called before ContainableBehavior::beforeFind(), but I'm having some trouble making that happen.
I don't want to make any assumptions about the apps that may use my plugin so I don't want to create an arbitrary dependency that defines how users have to configure any behaviors they're using. I'd like to just make the necessary adjustment on the fly where I need to make it. What I thought made the most sense is this:
In MyBehavior::setup(), I'm simply trying to detach and reattach the ContainableBehavior so that in the collection of behaviors attached to the parent model, it falls after MyBehavior:
# Assume that a condition checking existence is in place
$model->Behaviors->detach( 'Containable' );
$model->Behaviors->attach( 'Containable' );
If I then dump the list of attached behaviors, I get an array with the attached behaviors ordered the way I want them, but ContainableBehavior::beforeFind() still fires before MyBehavior::beforeFind().
Is there any way to force the execution order of behavior callbacks that isn't a total hack job or that doesn't impose an unrealistic dependency/standard on any apps that may deploy the plugin?
Thanks.
Related
If I want to get all Articles with comments, I need to do
$articles->find()->contain('Comments')->...
However, I might want to fetch the articles in many places all over my project and in nearly all cases load the comments as well. Currently I need to write a ->contain('Comments') again and again.
Is there a way I can define Comments as contained by default if I don't explicitly say I don't want them to be loaded?
Put it into a behavior into a beforeFind callback.
This way you can attach it to the model, and if needed you could even unload the behavior.
When I try to switch to edit mode for a Report source, a popup comes up telling me
"A new task will be created for the following request of user XXX".
A transport request is also being suggested.
I don't want to save my changes in this request however, but in another existing one. I am not aware of any versioning systems being implemented in my system, and don't know how to check that.
Is what i'm trying to achieve possible? And if so, how?
No, this is not possible. There are very good reasons for this being an exclusive lock -- reasons that you should know about before you attempt to change anything. Briefly speaking
The CTS only notes that an object was touched, not what change was made.
When the transport is released, the entire object in its current state is exported - there is no delta/diff logic involved.
Therefore you can't separately transport changes to the same development object. Furthermore, if you serialize this manually, the second transport will always comprise the changes of the first one.
Things get slightly more complicated with partial objects - you can have LIMU METH objects (methods of a class) in different transports, but as soon as you try to lock the R3TR CLAS main class, you'll have to resolve that.
I'm in the process of building a plugin that includes a behavior and several related models. My goal is to make this as easy as possible for the developer using the behavior. My perfect world has the dev simply attaching the behavior to any relevant models and configuring it.
The behavior interacts directly with one of the models and a hasOne association is being created on the fly, but the other models contain supporting data that is important. What I'd like to do is to have that model pull in its related data by modifying the Containable models.
In short:
MyModel (which actsAs the behavior) gets bound to top level model during the behavior's setup method.
The supporting models are directly associated to the top level model
In MyBehavior::beforeFind, I'd like to ensure that supporting model data is returned without the user having to know to ask for it when calling MyModel::find( ... ).
I haven't found the right keys that will allow me to modify these things at runtime. Maybe it's not even possible given that I want to essentially interact with another behavior (Containable).
Any thoughts would be appreciated.
This code automatically adds some contains to the find before it is run, you just have to make sure that your behavior is attached before the containable behavior or it will not work. The beforeFind callback for a behavior is only run once, so once containable has been called adding something like this does nothing. Took me a while to get it going because of that.
https://github.com/infinitas/infinitas/blob/dev/core/contents/models/behaviors/contentable.php#L65
I would like to make a program (I would prefer in C language) , but even in cocoa , that can take data from an external program (such as iTunes or adium) and will use them. For example i would like to take the data of a listbox or the text of the chat so as to manipulate it. I need a place to start. In windows I think it is possible with some apis that find the hWnd of a window and then find a pointer to the listbox or textbox. Please give me some info on how to start. Thanks you in advance.
It's not clear exactly what you want to do. It's either impossible or severely restricted.
For one thing, different applications use different ways of constructing a “listbox”—Cocoa applications use NSTableView, Carbon applications use DataBrowser, and GTK, Qt, and Java applications use even more different APIs. These do not all go through some common kind of list box thingy; each is an independent implementation.
(You could hope that either NSTableView or DataBrowser would be based on the other, but don't count on it.)
For another, it is impossible to obtain a pointer to that control. You cannot access another application's NSTableView or DataBrowser view or GTK/Qt/Java equivalent unless (and this only works for NSTableView) that application deliberately serves it up to you. It doesn't sound like that's your situation.
The closest you can get to that is Accessibility, which may be pretty close, but is unlikely to work with most applications not based on Cocoa.
Even then, the view may not be showing you all the data. A table view may be lazily populated, and a table view designed in imitation of the iOS UITableView may even never have all the data (because it only has what it can show).
(All of the above applies to every kind of view, not just table views. Collection views, text fields, buttons—same deal for all of them.)
The only way to get at the true, complete copy of the data is to ask the controller that owns it. And, again, that's impossible if the application is not specifically offering it to you. Not to mention, the application might not even have a controller (not object-oriented, not MVC, or just sloppily made).
… so as to manipulate it.
Getting the data in the first place is the easy part. It is nigh-impossible to mess with data in another application—for good reason.
The closest you're going to get to either of these goals is the Accessibility interfaces.
I have a collection of "active objects". That is, objects that need to preiodically update themselves. In turn, these objects should be used to update a WPF-based GUI.
In the past I would just have each object include it's own thread, but that only makes sense when working with a finite number of objects with well-defined life-cycles. Now I'm using objects that only exist when needed by a form so the life cycle is unpredicable. Also, I can have dozens of objects all making database and web service calls.
Under normal circumstances the update interval is 1 second, but it can take up to 30 seconds due to timeouts.
So, what design would you recommend?
You may use one dispatcher (scheduler) for all or group of active objects. Dispatcher can process high priority tasks at the first place then other ones.
You can see this article about the long-running active objects with code to find out how to do it. In additional I recommend to look at Half Sync/ Half Async pattern.
If you have questions - welcome.
I am not an expert, but I would just have the objects fire an event indicating when they've changed. The GUI can then refresh the necessary parts of itself (easy when using data binding and INotifyPropertyChanged) whenever it receives an event.
I'd probably try to generalize out some sort of data bus, if possible, and when objects are 'active' have them add themselves to a list of objects to be updated. I'd especially be tempted to use this pattern if the objects are backed by a database, as that way you can aggregate multiple queries, instead of having to do a single query per each object.
If there end up being no listeners for a specific object, no big deal, the data just goes nowhere.
The core updater code can then use a single timer (or multiple, or whatever is appropriate) to determine when to get updates. Doing this as more of a dataflow, and less of a 'state update' will probably save a lot of sanity in the end.