Twig foreach group by date - symfony

Question

I have a table with football matches called 'matches'. In that table there is a field 'kickoff', which is a datetime-column of the time when the match starts. With the following code I get all the matches out of the table.
$matches = $em->createQueryBuilder()
->select('m')
->from('FootballWcBundle:Matches', 'm')
->addOrderBy('m.kickoff', 'ASC')
->getQuery()
->getResult();
return $this->render('FootballWcBundle:Page:matches.html.twig', array(
'matches' => $matches
));
Now I want to show the matches on the screen grouped by the date.
Like this:
12-12-2014
match1
match2
14-12-2014
match3
match4
match5
Is there a way to let Twig know to group by the kickoff column or is there another way to do this?

Answer 1

You could do that as below:
{% set date = null %}
{% for match in matches %}
{% if date != match.kickoff %}
{% set date = match.kickoff %}
<h3>{{ date }}</h3>
{% endif %}
<p>{{ match.name }}</p>
{% endfor %}
In this way, you set the first date as null, and you iterate all matches and write a 'p' tag with the name (I supposed the match had a name to do the example), and when the date of the matches changes, you write a 'h3' tag with the date of the match. As date is set to null in the first iteration, the first date will be write.

Answer 2

There is a controlled break algorithm that originated from COBOL. It can be used in your case, you would have to rewrite it in TWIG though. I successfully used it in JAVA.
Below is C/C++ implementation of the controlled break algorithm. Take a look and use this principle for your case.
#include <iostream>
#define LMARG " "
#define UNDERLN "=============="
using namespace std;
void displayTable(int table[],short size);
//
// Purpose: Illustrated a controlled break algorithm
// Given an ordered sequence of data members, display with summary
//
int main(void)
{
int table[] = {10,12,12,30,30,30,30,40,55,60,60,60};
displayTable(table,sizeof(table)/sizeof(int));
fflush(stdin);
getchar();
return 0;
}
void displayTable(int table[],short size)
{
int currentKey,lastKey;
int i, categoryCount,groupTotal;
currentKey = lastKey = table[0];
groupTotal = categoryCount = i = 0;
while (i < size)
{
if (currentKey == lastKey)
{
groupTotal += table[i];
categoryCount++;
cout << LMARG << table[i] << endl;
}
else
{
cout << LMARG << UNDERLN << endl;
cout << "Total: " << groupTotal << endl;
cout << "Croup Count: " << categoryCount << endl << endl;
cout << LMARG << table[i] << endl; // start of next group
groupTotal = currentKey,categoryCount = 1;
fflush(stdin);getchar();
}
lastKey = currentKey;
currentKey = table[++i]; // get next key
} // while
cout << LMARG << UNDERLN << endl; // last group summary
cout << "Total: " << groupTotal << endl;
cout << "Croup Count: " << categoryCount << endl << endl;
}