I'm currently using the Zend_Db class to manage my database connections.
I had a few questions about it.
Does it manage opening connections smartly? (eg, I have a connection already open, does it know to take use of it - or do I have to constantly check if theres' already an open connection before I open a new one?)
I use the following code to fetch results (fetching in FETCH_OBJ mode):
$final = $result->fetchAll();
return $final[0]->first_name;
for some reason, fetchRow doesn't work - so I constantly use fetchAll, even when I'll only have one result (like searching WHERE id= number and id is a PK)
My question is - how much more time/memory am I sacrificing when I use fetchAll and not fetchRow, even when there's only result?
I've created the following class to manage my connections:
require 'Zend/Db.php';
class dbconnect extends Zend_Db
{
function init ()
{
$params = array (......
return Zend_Db::factory ( 'PDO_MYSQL', $params );
}
}
and then I call
$handle = dbconnect::init
$handle->select()....
is this the best way? does anyone have a better idea?
Thanks!
p.s. I'm sorry the code formatting came out sloppy here..
Lots of questions!
Does it manage opening connections
smartly?
Yes, when you run your first query, a connection is created, and subsequent queries use the same connection. This is true if you're reusing the same Zend_Db adapter. I usually make it available to my entire application using Zend_Registry:
$db = Zend_Db::factory(...) // create Db instance
Zend_Registry::set('db', $db);
//in another class or file somewhere
$db = Zend_Registry::get('db');
$db->query(...)//run a query
The above code usually goes in your application bootstrap. I wouldn't bother to extend the Zend_Db class just to initialise and instance of it.
Regarding fetchRow - I believe the key difference is that the query run is limited to 1 row, and the object returned is a Zend_Db_Table_Row rather than a Zend_Db_Table_Rowset (like an array of rows), and does not perform significantly slower.
fetchRow should be fine so post some code that's not working as there's probably a mistake somewhere.
addition to dcaunt's answer:
FetchAll returns array OR Zend_Db_Talbe_Rowset - depending on if you execute $zendDbTableModel->fetchAll() or $dbAdapter->fetchAll()
Same goes for fetchRow(). If you fail to make fetchRow working for models, it's easier to use $model->getAdapter()->fetchRow($sqlString);
Related
I am building an extension with a backend module. When I call the findAll() method it returns a "QueryResult" object.
I tried to retrieve objects with findByUid() and it does work.
I set the storage pid in the typoscript:
plugin.tx_hwforms.persistence.storagePid = 112
I can also see it in the typoscript object browser.
I also added this to my repository class:
public function initializeObject()
{
$defaultQuerySettings = $this->objectManager->get(\TYPO3\CMS\Extbase\Persistence\Generic\Typo3QuerySettings::class);
$defaultQuerySettings->setRespectStoragePage(false);
$this->setDefaultQuerySettings($defaultQuerySettings);
}
so that the storage pid is ignored ...
It's still not working, findAll doesn't return an array of entites as it should
Repository must return a QueryResult from the findAll methods. Only methods which return a single object (findOneByXYZ) will return anything else.
All of the following operations will cause a QueryResult to load the actual results it contains. Until you perform one of these, no results are loaded and debugging the QueryResult will yield no information except for the original Query.
$queryResult->toArray();
$queryResult->offsetGet($offset); and $queryResult[$offset];
$queryResult->offsetExists($offset);
$queryResult->offsetSet($offset, $value); and $queryResult[$offset] = $value; (but be aware that doing this yourself with a QueryResult is illogical).
$queryResult->offsetUnset($offset); and unset($queryResult[$offset]); (again, illogical to use this yourself)
$queryResult->current(), ->key(), ->next(), ->prev(), ->rewind() and ->valid() which can all be called directly or will be called if you begin iterating the QueryResult.
Note that ->getFirst() and ->count() do not cause the original query to fire and will not fill results if they are not already filled. Instead, they will perform an optimised query.
Summa summarum: when you get a QueryResult you must trigger it somehow, which normally happens when you begin to render the result set. It is not a prefilled array; it is a dynamically filled Iterator.
This should work.there must be issue with your storage page in FindAll() extbase check for storage but in findByXXX() it ignore storage.
$objectManager = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\\CMS\Extbase\\Object\\ObjectManager');
$querySettings = $objectManager->get('TYPO3\\CMS\\Extbase\\Persistence\\Generic\\Typo3QuerySettings');
$querySettings->setRespectStoragePage(FALSE);
$this->cityRepository->setDefaultQuerySettings($querySettings);
$cities = $this->cityRepository->findAll();
Use additionally typoscript module configuration, like
module.tx_hwforms.persistence.storagePid = 112
Ensure your Typoscript is loaded in root. For BE modules I prefere to use
EXT:hwforms/ext_typoscript_setup.txt
where you write your module and extbase configuration.
Try to debbug like below and check findAll() method present for this repositry. I think this is useful for you click here
\TYPO3\CMS\Extbase\Utility\DebuggerUtility::var_dump(get_class_methods($this->yourRepositryName)); exit();
Afetr added all your changes once you need to uninsatll/install extension.
I would inspect the generated query itself. Configure the following option in the install tool:
$GLOBALS["TYPO3_CONF_VARS"]["sqlDebug"]
Note: dont do this in production environemnt!!
Explanation for sqlDebug:
Setting it to "0" will avoid any information being print on screen.
Setting it to "1" will show errors only.
Setting it to "2" will print all queries on screen.
So in Production you want to keep it at "0", in development environments you should set it to "1", if you want to know why some result is empty, configure it to "2".
I would guess that some enablefield configuration causes your problem.
If you retrieve an object by findByUid you will have the return because enablefields are ignored. In every other case enablefields are applied and that may cause your empty result.
How do I "tell" EF to log queries globally? I was reading this blog post: EF logging which tells in general how to log sql queries. But I still have a few questions regarding this logger.
Where would I need to place this line context.Database.Log = s =>
logger.Log("EFApp", s);?
Can it be globally set? Or do I have to place it everywhere I do DB
operations?
In the "Failed execution" section, the blogger wrote that, and I
quote:
For commands that fail by throwing an exception, the output contains the message from the exception.
Will this be logged too if I don't use the context.Database.Log?
Whenever you want the context to start logging.
It appears to be done on the context object so it should be done every time you create a new context. You could add this line of code in your constructor though to ensure that it is always enabled.
It will not log if you do not enable the logging.
I don't recommend to use that's functionality, because, it hasn't reason to exists in the real case.
Thats it use a lot of to debug code only. But, wether you wanna know more than details ... access link... https://cmatskas.com/logging-and-tracing-with-entity-framework-6/
In this case you can put code like this
public void Mylog()
{
//Thats a delegate where you can set this property to log using
//delegate type Action, see the code below
context.Database.Log = k=>Console.Write("Any query SQL")
//Or
context.Database.Log = k=>Test("Any query SQL")
}
public void Test(string x){
Console.Write(x)
}
I hope thats useufull
I know there´s a similar situation in stack, and I´ve already checked it out and the answers have not guided me to mine.
Here´s the deal:
I need to execute raw SQL, an INSERT to be precise. I have multiple values to insert as well. No problem since Zend let´s you use "query" from Zend_Db_Table (I use my default adapter, initialized in my application.ini file).
$db_adapter = Zend_Db_Table::getDefaultAdapter();
....query gets built...
$stmt = $db_adapter->query($query);
$stmt->execute();
When doing var_dump($query); this is what I see:
INSERT INTO tableName (col1,col2,col3) VALUES ('value1', 'value2', 'value3')
I have already tried the following:
I have no "manifesto" attribute on the html page rendered
I have looked at the network both with Chrome and Firefox to see the POSTS/GETS getting sent, and the controller whose actions does
this INSERT gets called once with a POST.
It is true that I call a viewscript from another action to be rendered, like so:
$this->renderScript('rough-draft/edit.phtml');
I don´t see how that could affect the statement getting executed twice.
I know it gets executed twice:
Before the POST is sent, the data base has nothing, clean as a whistle
POST gets sent, logic happens, from is rendered again
Data base now has the same record twice (with the name that has been inserted from the POST), so it´s not a rendering problem
It has to do with the way I am executing raw SQL, because if I use ->insert($data) method that comes with Zend_Db_Table_Abstract (obviously I declare a class that extends from this abstract one and bind it to the appropriate table) it does not insert the record twice. Thing is, I want to use raw SQL.
I really appreciate your help!
Expanded as requested:
Controller code:
public function saveAction()
{
$request = $this->getRequest();
if (!$request->isPost())
$this->_sendToErrorPage();
$this->_edit_roughdraft->saveForm($request->getPost());
$this->view->form = $this->_edit_roughdraft->getForm();
$this->renderScript('rough-draft/edit.phtml');
}
Code from model class (in charge of saving the form from the data in POST):
public function saveForm($form_data) {
$db = new Application_Model_DbTable_RoughDrafts();
$id = $form_data['id'];
$db->update($this->_get_main_data($form_data), array('id=?' => $id));
/* Main data pertains to getting an array with the data that belongs to yes/no buttons
* and text input. I need to do it as so because the other data belongs to a dynamically
* built (by the user) multi_select where the options need to be deleted or inserted, that
* happens below
*/
$multi_selects = array('responsables', 'tareas', 'idiomas', 'habilidades', 'perfiles');
foreach($multi_selects as $multi_select){
if(isset($form_data[$multi_select]) && !empty($form_data[$multi_select])){
$function_name = '_save_'.$multi_select;
$this->$function_name($form_data[$multi_select], $id);
}
}
$this->_form = $this->createNewForm($id, true);
//The createNewForm(..) simply loads data from data_base and populates form
}
I do want to make clear though that I have also used $db->insert($data), where $db is a class that extends from Zend_Db_Table_Abstract (associated to a table). In this case, the record is inserted once and only once. That´s what leads me to believe that the problem lies within the execution of my raw sql, I just don´t know what is wrong with it.
I should have done this from the beginning, thanks for the help everyone, I appreciate your time.
I knew the problem was with my syntax, but I didn´t know why. After looking at different examples for how people did the raw sql execution, I still didn´t understand why. So I went ahead and opened the class Zend_Db_Adapter_Abstract in Zend library and looked for the 'query()' method I was using to get the statement to execute.
public function query($sql, $bind = array())
{
...some logic...
// prepare and execute the statement with profiling
$stmt = $this->prepare($sql);
**$stmt->execute($bind);**
// return the results embedded in the prepared statement object
$stmt->setFetchMode($this->_fetchMode);
return $stmt;
}
So the ->query(..) method from the Zend_Db_Adapter already executes said query. So if I call
->execute() on the statement that it returns, I'll be the one causing the second insert.
Working code:
$db_adapter = Zend_Db_Table::getDefaultAdapter();
....query gets built...
$db_adapter->query($query);
Ok, so I am trying to extract the information from a cache.dat database sent from another business. I am trying to get at the data using the ODBC. I am able to see the globals from the samples namespace when trying to export to Access, but I can't get the data from this new database to show up.
I've tried to tackle this problem two ways. First, I simply shut down Cache, replaced the
existing database in InterSystems\TryCache\mgr\samples and restart cache. Once I restart I can see all the globals in the Management Portal from the new database. If I test the ODBC connection from the Windows ODBC administrator it connects. However, when I try to pull them into an access database using ODBC there are no tables showing up to import.
I've also tried to add the database to my Cache but it gave me the error:
ERROR #5805: ID key not unique for extent 'Config.Databases'
I tried to fool around with the values in there but to no avail. This is my first time messing with anything like this and any, ANY help would be awesome.
If you access the Management Portal do you see any table definitions defined for your namespace. If not, the application was written in CacheObjectScript with no Classes created to provide Object/SQL access. If this is the case then it could be a fair amount of work to create the classes that describe the data(global structures.)
Matt,
Did the business that provided the CACHE.DAT file indicate that you should have ODBC access to the data?
Did they provide some document describing the data/globals? If they provided a document that describes the globals you could create the classes that map the data. Depending on what you want to do this could either be a resource intensive process or not.
If you want to directly access globals you can create a stored procedure that will do so. You should consider the security implications before you do this - it will expose all data in the global to anyone with ODBC access.
Here is an example of a stored procedure that returns the values of up to 9 global subscripts, plus the value at that node. You can modify it pretty easily if you need to.
Query OneGlobal(GlobalName As %String) As %Query(ROWSPEC = "NodeValue:%String,Sub1:%String,Sub2:%String,Sub3:%String,Sub4:%String,Sub5:%String,Sub6:%String,Sub7:%String,Sub8:%String,Sub9:%String") [SqlProc]
{
}
ClassMethod OneGlobalExecute(ByRef qHandle As %Binary, GlobalName As %String) As %Status
{
S qHandle="^"_GlobalName
Quit $$$OK
}
ClassMethod OneGlobalClose(ByRef qHandle As %Binary) As %Status [ PlaceAfter = OneGlobalExecute ]
{
Quit $$$OK
}
ClassMethod OneGlobalFetch(ByRef qHandle As %Binary, ByRef Row As %List, ByRef AtEnd As %Integer = 0) As %Status [ PlaceAfter = OneGlobalExecute ]
{
S Q=qHandle
S Q=$Q(#Q) b
I Q="" S Row="",AtEnd=1 Q $$$OK
S Depth=$QL(Q)
S $LI(Row,1)=$G(#Q)
F I=1:1:Depth S $LI(Row,I+1)=$QS(Q,I)
F I=Depth+1:1:9 S $LI(Row,I+1)=""
S AtEnd=0
S qHandle=Q
Quit $$$OK
}
I don't have code for you to get this from access, but for reference, to access this from python you might use (with pyodbc):
import pyodbc
import win32com.client
import urllib2
class CacheOdbcClient:
connectionString="DSN=MYCACHEDSN"
def __init__(self):
pass
def getGlobalAsOverlyLargeList(self):
connection=pyodbc.connect(self.connectionString)
cursor=connection.cursor()
cursor.execute("call MyPackageName.MyClassName_OneGlobal ?","MYGLOBAL")
list=[]
for row in cursor :
list.append((row.NodeValue,row.Sub1,row.Sub2,row.Sub3,row.Sub4,row.Sub5,row.Sub6,row.Sub7,row.Sub8,row.Sub9))
return list
I'm trying to use Class::DBI with a simple one parent -> may chidren relationships:
Data::Company->table('Companies');
Data::Company->columns(All => qw/CompanyId Name Url/);
Data::Company->has_many(offers => 'Data::Offer'=>'CompanyId'); # =>'CompanyId'
and
Data::Offer->table('Offers');
Data::Offer->columns(All => qw/OfferId CompanyId MonthlyPrice/);
Data::Offer->has_a(company => 'Data::Company'=>'CompanyId');
I try to add a new record:
my $company = Data::Company->insert({ Name => 'Test', Url => 'http://url' });
my $offer = $company->add_to_offers({ MonthlyPrice => 100 });
But I get:
Can't locate object method "add_to_offers" via package "Data::Company"
I looked at the classical Music::CD example, but I cannot figure out what I am doing wrong.
I agree with Manni, if your package declarations are in the same file, then you need to have the class with the has_a() relationship defined first. Otherwise, if they are in different source files, then the documentation states:
Class::DBI should usually be able to
do the right things, as long as all
classes inherit Class::DBI before
'use'ing any other classes.
As to the three-argument form, you are doing it properly. The third arg for has_many() is the column in the foreign class which is a foreign key to this class. That is, Offer has a CompanyId which points to Company's CompanyId.
Thank you
Well, the issue was actually not my code, but my set up. I realized that this morning after powering on my computer:
* Apache + mod_perl on the server
* SMB mount
When I made changes to several files, not all changes seems to be loaded by mod_perl. Restarting Apache solves the issue. I've actually seen this kind of issue in the past where the client and SMB server's time are out of sync.
The code above works fine with 1 file for each module.
Thank you
I really haven't got much experience with Class:DBI, but I'll give this a shot anyway:
The documentation states that: "the class with the has_a() must be defined earlier than the class with the has_many()".
I cannot find any reference to the way you are using has_a and has_many with three arguments which is always 'CompanyId' in your case.