I would like to know if I can use a data property in another data property as a formula, here I leave the example I want to perform
Reputation = Initial perception (data property) * 0.20 + Travel confidence (data property) * 0.30
experience history (previous data) * 0.50
The experience history is the data that was previously received from the reputation, I would also like to know how to obtain the data that was previously had in the ontology of that property data
Related
In the next code I want to load data from the data base in to the from. (Edit Form)
$model = $this->add('Model_Partner');
$model->addCondition('id','1');
$form = $this->add('Form');
$form->setModel($model);
$form->addSubmit();
The form comes empty,
What is the probem?
Thanks
In Agile Toolkit model can "load" one record at a time. By using Conditions you tighten the number of records it can potentially load. It will actually not produce any query.
$model->load(1);
$form->setModel($model);
this should be the correct approach. You do not need to set condition as load() takes care of that.
I want to get the raw value of a numberfield by looking up its id. Here the raw value is 4 and the id of the numberfield is satirSayisi.
I have tried several combinations but non has worked.
grid.header.getById('satirSayisi').getRawValue()
Ext.getCmp('satirSayisi').getRawValue()
Your example is a little short on detail, but I think I've got the idea. You have a grid, and you want to 1) get the selection, 2) get the model from this selection so that you can 3) get the value of a number field (satirSayisi). I'm assuming satirSayisi is the column name in the model, and not necessarily the id or itemId property.
Assuming that you have a handle on the grid, you grab a model from the selection like so:
var model = grid.getSelectionModel().getSelection();
Now you have a model instance (which should correspond to your database columns in some way). To get the value from satirSayisi, you would say:
var stuff = model.get('satirSayisi');
Accessing components by Id in ExtJS is no longer recommended. They suggest the use of itemId over id. A better way to get access to an object is ComponentQuery, such as...
component = Ext.ComponentQuery.query('button#Save')[0];
This example will give you a handle on the first button type object in your application with the itemId of Save. It will always grab stuff in an array, even when there is just one result.
Good luck!
Let's say I'm modeling a website where a web page would be represented by a PageModel, like so:
class PageModel(db.Model):
name = db.StringProperty()
parentPage = db.SelfReferenceProperty()
content = db.TextProperty()
I'd like to be able to pull a list of all my page objects, in order to render menus, etc., but without having to pull in the content for all the items. How would you model this object so that you could pull in the content only when you needed it? Would it require a 1-to-1 reference relationship with a separate 'content' model? And if so, would you make the reference on the page object or on the content object?
You could move the content property into a new model (PageContentModel). I would implement the reference by having the parent of the PageContentModel be the PageModel (using the parent property of db.Model). This allows you to modify both of them in a single transaction (as they are in a single entity group).
One benefit of modeling things with the PageContentModel having a reference to the PageModel (as opposed to the PageModel having a reference to the PageContentModel) is that if you ever need content to be larger than 1MB you can do so by allowing each PageModel to have 1 or more PageContentModel objects and you would just split your content into 1MB chunks and write each chunk to a different PageContentModel instance. To be able to get the content back you would need the PageContentModel objects to have an "order" property associated with them so you can re-build your content in the correct order.
To query for the PageContentModel instances related to a PageModel you would use the ancestor filter like this:
PageContentModel.all().ancestor(page_model_instance)
As suggested by #Nick another way to do this would be to use the files api to write the content to a blob in the blobstore and then link that blob to the PageModel by having a BlobReferenceProperty on the PageModel. I have now had a chance to try this and it is working pretty well (despite it being an experimental feature). This would allow your content to be very large and, under the new pricing model, is actually cheaper than storing your content inside the datastore model.
Updated Feb 7, 2012 to include suggestion from #Nick about the blobstore.
I am having problems saving database records using Linq in visual studio 2010 and sql server 2008.
My problem is that when I am editing some records I sometimes check the original database record for validation purposes, only the original entry seems to be updated in real time - I.e. it is already exactly the same as the edited record, before I have submitted the changes!
Could anyone suggest an effective method of coping with this? I have tried using a 2nd database connection or a 2nd data repository to call the original record from the db but it appears to be already changed when I debug it.
public void SaveobjectEdit(object objectToEdit)
{
object originalObject = GetobjectById(objectToEdit.Id);
if (originalObject.objectStatus != objectToEdit.objectStatus)
{
originalObject.objectStatus = objectToEdit.objectStatus;
}
SaveChanges();
}
The save changes just calls _db.SubmitChanges(); by the way
Has no one got any ideas for the above question?
I hope I was clear - for validation purposes I would like to compare an original database record with one that I am editing. The problem is that when I edit a record and then attempt to retrieve the original record before saving - the original record is exactly the same as the edited record.
If you're trying to retrieve the original record in code, from the same 'context' using the same access method, then it will contain the updated object. Rather than ask why you're doing this or what you're trying to achieve, I'll instead explain how I understand the data context / object context to work (in a very loose and vague fashion).
The context is something like an in-memory representation of your database, where everything is lazy-loaded. When you instantiate the context you're given an object which represents your data model (of course it may not be a 1-1 representation, and can contain various abstractions). Nothing is loaded into the context until necessary; any queries you write stay as queries until you peer in their results. When you access an item (e.g. GetobjectById(objectToEdit.Id)) the item is loaded into the context from the database and you can get and set its properties at your leisure.
Now, the important part: When you access an item, if it has already been loaded into the context then that in-memory object is returned. The context doesn't care about checking changes made; the changes won't be persisted to the database until you submit, but they remain in memory.
The way to refresh the in-memory objects is to call the Refresh method on the context. Try this test:
using (var db = new MyObjectContext())
{
var item = db.Items.First();
item.Name = "testing this thing";
Console.WriteLine(db.Shifts.First().Name);
db.Refresh(System.Data.Objects.RefreshMode.StoreWins, db.Items);
Console.WriteLine(db.Shifts.First().Name);
}
I believe this pattern makes a lot of sense and I'm not sure it could work any other way. Consider this:
foreach (var item in db.Items)
{
item.Name = "test";
}
Assert(db.Items.All(item => item.Name == "test"));
Would you want the Assert to fail? Should those items be reloaded? I don't believe so. I'm looking at the items in my context, not in the database. I'm not checking whether items in the database have been updated, but instead that I've updated all the items in the context of my code.
This is a good reason why I don't use MyObjectContext db - it is not a 'db' or a database connection. It's a context within which I can change whatever I want, so I name it such: MyObjectContext context.
quite an explanation here, hope someone has the patience to read it through
I'm building an application in Flex 4 that handles an ordering system. I have a small mySql database and I've written a few services in php to handle the database.
Basically the logic goes like this:
I have tables for customers, products, productGroups, orders, and orderContent
I have no problem with the CRUD management of the products, orders and customers, it is the order submission that the customer will fill in that is giving me headaches:
What I want is to display the products in dataGrids, ordered by group, which will be populated with Flex datamanagement via the php-services, and that per se is no problem. But I also want an extra column in the datagrid that the user can fill in with the amount he wishes to order of that product. This column would in theory then bind to the db table "orderContent" via the php services.
The problem is that you would need to create a new order in the database first that the data could bind to (orderContent is linked to an order in the db).
I do not want to create a new order every time a user enters the page to look at the products, rather I would like to create the order when a button is pressed and then take everything from the datagrids on the page and submit it into the database.
My idea has been to create a separate one-column datagrid, line it up next to the datagrid that contains the products and in that datagrid the user would be able to enter the amount of that product he'd like to order.
I've created a valueObject that contains the data I would need for an order:
Code:
package valueObjects
{
public class OrderAmount
{
public var productId:int;
public var productAmount:int;
public var productPrice:Number;
public function orderAmount()
{
}
}
}
My idea was to use a service to get all products from a certain group, populate an ArrayCollection with the data, then transfer each object in that ArrayCollection to an instance of the Value Object above, add the value object to another ArrayCollection that would the be used as a dataProvider for the one-column datagrid (I would only display amount which would be set to zero at first, but use the other data upon transfering it to the db)
I've tried to use the results from the automatically generated serviceResults that retrieve the products for the datagrid and put in a resultHandler that transfers the valueobjects, however this does not seem to work.
Basically my question is this: Am I approaching this thing completely wrong, or is there a way I can get it to work the way I planned?
Would I need to create a completely new service request to get the product id:s, and price to populate the one-column datagrid.
I'll post some code if that would help.
Thank you if you read this far.
Solved it by creating a Value Object class to hold all the info needed for each row in the grid and from the php service that returned all products in a group, I looped through the result and transfered the data needed into my Value Object.
I then added each Value Object into an ArrayCollection and made that the dataProvider for the dataGrid.
No need to use two grids. I forgot how logic things get when you think of datagrid data just as an ArrayCollection and forget the visual presentation of it on screen.
Put in a few itemRenderers and the whole thing is beautiful!