I'm trying to figure out how to have the execute method of an ZF2 SQL Statement class to return an array of objects rather than an array of arrays. The documentation/reference seems to lack severely in this area and the code isn't documented properly.
This is what I have (I'm using the PDO MySQL driver but that should not be relevant):
$sql = new Sql( $db );
$query = $sql->select()
->from('users')
->where('id > 1');
$stmt = $sql->prepareStatementForSqlObject( $query );
$results = $stmt->execute();
$results is now an array of arrays but I need it to be an array of objects instead. How can I specify this?
I think that most people use doctrine for ORM
http://www.jasongrimes.org/2012/01/using-doctrine-2-in-zend-framework-2/
Related
I need to test the structure of my SQLite database which is composed by a unique table with let's say 2 columns (id, name). I can't figure out the SQL query to get the table schema of my database.
I am able to get all the content of the database using the DBI method selectall_arrayref(). However it only returns an array containing the values inside my database. This information is useful but I would like to have a SQL query which returns something like id, name (Basically, the table schema).
I tried the following queries : SHOW COLUMNS FROM $tablename but also SELECT * from $tablename (This one returns all the table content).
Here is my implementation so far :
# database path
my $db_path = "/my/path/to/.database.sqlite";
my $tablename = "table_name";
sub connect_to_database {
# Connect to the database
my $dbh = DBI->connect ("dbi:SQLite:dbname=$db_path", "", "",
{ RaiseError => 1, AutoCommit => 0 },
)
or confess $DBI::errstr;
return $dbh;
}
sub get_database_structure {
# Connect to the database
my $dbh = &connect_to_database();
# Get the structure of the database
my $sth = $dbh->prepare("SHOW COLUMNS FROM $tablename");
$sth->execute();
while (my $inphash = $sth->fetrow_hashref()) {
print $inphash."\n";
}
# Disconnect from the database
$dbh->disconnect();
}
# Call the sub to print the database structure
&get_database_structure();
I expect the output to be the structure of my table so id, name but I raise an error : DBD::SQLite::db prepare failed: near "SHOW": syntax error
I can't find the good query. Any comments or help would be greatly appreciated.
Thanks !
What you're looking for is really just the SQL lite query for the table and column information. This answer SQLite Schema Information Metadata has the full details if this query doesn't work for you, but under the assumption you're using whatever the 'recent' version mentioned in one of the answers is, you can do something like this:
# Get the structure of the database
my $sth = $dbh->prepare("<<END_SQL");
SELECT
m.name as table_name,
p.name as column_name
FROM sqlite_master AS m
JOIN pragma_table_info(m.name) AS p
ORDER BY m.name, p.cid
END_SQL
$sth->execute();
my $last = '';
while (my $row = $sth->fetchrow_arrayref()) {
my ($table, $column) = #$row;
if ($table ne $last) {
print "=== $table ===\n";
$last = $table;
}
print "$column\n";
}
After digging through the community answers I finally find a solution using the pragma table_info.
sub get_database_structure {
# Connect to the database
my $dbh = &connect_to_database ();
# Return the structure of the table execution_host
my $sth = $dbh->prepare('pragma table_info(execution_host)');
$sth->execute();
my #struct;
while (my $row = $sth->fetchrow_arrayref()) {
push #struct, #$row[1];
}
# Disconnect from the database
$dbh->disconnect ();
return #struct;
}
It returns a list of the columns name present in the table execution_host.
Thanks for the help !
I have called a stored procedure inside cakephp3 model. I need to get the return value from stored procedure and use it in cakephp3, how to do it.
$conn = ConnectionManager::get('default');
$result = $conn->execute("call custom_sp($currentId, #msg)");
First things first, please always use prepared statements, you never know if the received value, or the called procedure might change at some point, which could possibly result in an SQL injection vulnerability!
That being said, it depends on what exactly your stored procedure does. If it only SELECTs the value into an OUT parameter, then you have to issue an additional SELECT statement and select the #msg variable.
$connection = ConnectionManager::get('default');
$statement = $connection->prepare('call custom_sp(:id, #msg)');
$statement->bindValue('id', 1, 'integer');
$statement->execute();
$statement->closeCursor();
$statement = $connection->execute('SELECT #msg');
$result = $statement->fetch('assoc');
$statement->closeCursor();
In case the stored procedure issues an additional SELECT query itself, then the second query wouldn't be neccessary, and you could fetch the data from the first statement:
$statement = $connection->prepare('call custom_sp(:id, #msg);');
$statement->bindValue('id', $currentId, 'integer');
$statement->execute();
$result = $statement->fetch('assoc');
$statement->closeCursor();
See also
Cookbook > Database Access & ORM > Database Basics
I'm using PHP7 (with Droctrine 2.5.13) on Ubuntu 16.04 x64.
I'm trying to do a prepared statment to a Microsoft SQL database using a named variable like so:
$sql = 'SELECT DISTINCT
"PRODUCT"."NUMBER"
FROM
"PRODDB"."PRODUCT"
WHERE
"PRODUCT"."NUMBER" LIKE :productNumber
ORDER BY
"PRODUCT"."NUMBER" DESC';
$query = $this->db->prepare($sql);
$query ->bindParam(':productNumber' , $ofSearch);
$status = $query->execute();
$result = $query->fetchAll();
But SQL tell me that I need to use question mask instead of the named parameter
Error : sqlsrv does not support named parameters to queries, use question mark (?)
If I replace the named variable by a question mark it work fine.
The example below work fine:
$sql = 'SELECT DISTINCT
"PRODUCT"."NUMBER"
FROM
"PRODDB"."PRODUCT"
WHERE
"PRODUCT"."NUMBER" LIKE ?
ORDER BY
"PRODUCT"."NUMBER" DESC';
$query = $this->db->prepare($sql);
$query ->bindParam(1 , $ofSearch);
$status = $query->execute();
$result = $query->fetchAll();
Using question mark is a terrible way to do prepared statement as when you have very complex query with over 20 parameters it become a nightmare to maintain.
Do you have any idea if there is a solution to this problem or at least a workaround?
As show at CakePHP 2.1.x - Run a query without any models in AppController
I have a query,
$q = "select id from table where id=123";
$db = ConnectionManager::getDataSource('default');
$qr = $db->rawQuery($q);
ok (!), it works... But, how to get my data?? Where the tutorial examples?
I need something like $data = $qr->fetchAll() method or $id = getMyData($qr) function.
I believe this may be the solution or at least a point in the right direction.
$q = "select id from table where id=123";
$db = ConnectionManager::getDataSource('default');
$myData = $db->query($q);
I have been able to create simple MVC app to display the form and use information from the database. [ so sql I use SELECT ].
However, when I use 'update' or 'delete' the data in the database stay the same. I don't understand!?!
[ I use controller.php call model and pass id to match with the row in the table]
I check data that pass in there, and it did echo the value of id.
The page I load from the controller that call method in model has complete without the error (it could be that the syntax is right, but logic is wrong).
so i start to change sql statement to SELECT and it gives me the value that match with $id param'
I don't understand? any clue?
$query = JFactory::getDbo()->getQuery(true);
$db =& JFactory::getDBO();
$query = "DELETE FROM `menutables` WHERE `id2` = $id ";
$db->setQuery($query);
$db->query(); // this line I also take it out to test, it is fine but no data change either
Do you try to modify a Joomla database or a personal one?
Look at this pages :
http://docs.joomla.org/How_to_connect_to_an_external_database
http://docs.joomla.org/How_to_use_the_database_classes_in_your_script#Tips.2C_Tricks_.26_FAQ
try to use either
$query = "DELETE FROM #__menutables WHERE id2 = '$id' ";
or
$query = "DELETE FROM #__menutables WHERE id2 = '".$id."' ";
it'll work fine then.
Deleting a Record
delete query in Joomla 2.5.
$db = JFactory::getDbo();
$query = $db->getQuery(true);
// delete all custom keys for user 1001.
$conditions = array(
$db->quoteName('user_id') . '=1001',
$db->quoteName('profile_key') . '=\'custom.%\''
);
$query->delete($db->quoteName('#__user_profiles'));
$query->where($conditions);
$db->setQuery($query);