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API CHANGE DataList::subtract and DataQuery::subtract for subtracting a list from another list

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Minor Stripped out ManyManyList tests from DataListTest into it's own test case
This commit is contained in:
Stig Lindqvist 2012-01-26 11:53:12 +13:00
parent 3a5d37ec75
commit 7f09b6931b
7 changed files with 193 additions and 76 deletions
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17
docs/en/topics/datamodel.md
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@ -219,6 +219,23 @@ members whose first name is either Sam or Ingo.
'FirstName' => array('sam', 'ingo'),
));
### Subtract
You can subtract entries from a DataList by passing in another DataList to `subtract()`
:::php
$allSams = DataList::create('Member')->filter('FirstName', 'Sam');
$allMembers = DataList::create('Member');
$noSams = $allMembers->subtract($allSams);
Though for the above example it would probably be easier to use `filter()` and `exclude()`. A better
use case could be when you want to find all the members that does not exist in a Group.
:::php
// ... Finding all members that does not belong to $group.
$otherMembers = DataList::create('Member')->subtract($group->Members());
### Relation filters
So far we have only filtered a data list by fields on the object that you're requesting. For simple cases, this might

21
model/DataList.php
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@ -325,6 +325,27 @@ class DataList extends ViewableData implements SS_List {
return $this;
}
/**
* This method returns a list does not contain any DataObjects that exists in $list
*
* It does not return the resulting list, it only adds the constraints on the database to exclude
* objects from $list.
* The $list passed needs to contain the same dataclass as $this
*
* @param SS_List $list
* @return DataList
* @throws BadMethodCallException
*/
public function subtract(SS_List $list) {
if($this->dataclass() != $list->dataclass()) {
throw new InvalidArgumentException('The list passed must have the same dataclass as this class');
}
$newlist = clone $this;
$newlist->dataQuery->subtract($list->dataQuery());
return $newlist;
}
/**
* Add an inner join clause to this data list's query.
*

13
model/DataQuery.php
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@ -505,6 +505,19 @@ class DataQuery {
return $modelClass;
}
/**
* Removes the result of query from this query.
*
* @param DataQuery $subtractQuery
* @param string $field
*/
public function subtract(DataQuery $subtractQuery, $field='ID') {
$subSelect= $subtractQuery->getFinalisedQuery();
$subSelect->select($this->expressionForField($field, $subSelect));
$this->ensureSelectContainsOrderbyColumns($subSelect);
$this->where($this->expressionForField($field, $this).' NOT IN ('.$subSelect->sql().')');
}
/**
* Select the given fields from the given table
*/

36
model/ManyManyList.php
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@ -4,30 +4,50 @@
* Subclass of {@link DataList} representing a many_many relation
*/
class ManyManyList extends RelationList {
protected $joinTable;
protected $localKey;
protected $foreignKey, $foreignID;
protected $extraFields;
/**
* Synonym of the constructor. Can be chained with literate methods.
* ManyManyList::create("Group","Member","ID", "GroupID")->sort("Title") is legal, but
* new ManyManyList("Group","Member","ID", "GroupID")->sort("Title") is not.
*
* @param string $dataClass The class of the DataObjects that this will list.
* @param string $joinTable The name of the table whose entries define the content of this many_many relation.
* @param string $localKey The key in the join table that maps to the dataClass' PK.
* @param string $foreignKey The key in the join table that maps to joined class' PK.
* @param string $extraFields A map of field => fieldtype of extra fields on the join table.
*
* @see ManyManyList::__construct();
* @example ManyManyList::create('Group','Group_Members', 'GroupID', 'MemberID');
*/
public static function create($dataClass, $joinTable, $localKey, $foreignKey, $extraFields = array()) {
return new ManyManyList($dataClass, $joinTable, $localKey, $foreignKey, $extraFields = array());
}
/**
* Create a new ManyManyList object.
*
* A ManyManyList object represents a list of DataObject records that correspond to a many-many
* relationship. In addition to,
*
*
*
* Generation of the appropriate record set is left up to the caller, using the normal
* {@link DataList} methods. Addition arguments are used to support {@@link add()}
* and {@link remove()} methods.
*
* @param $dataClass The class of the DataObjects that this will list.
* @param $joinTable The name of the table whose entries define the content of this
* many_many relation.
* @param $localKey The key in the join table that maps to the dataClass' PK.
* @param $foreignKey The key in the join table that maps to joined class' PK.
* @param $extraFields A map of field => fieldtype of extra fields on the join table.
* @param string $dataClass The class of the DataObjects that this will list.
* @param string $joinTable The name of the table whose entries define the content of this many_many relation.
* @param string $localKey The key in the join table that maps to the dataClass' PK.
* @param string $foreignKey The key in the join table that maps to joined class' PK.
* @param string $extraFields A map of field => fieldtype of extra fields on the join table.
*
* @example new ManyManyList('Group','Group_Members', 'GroupID', 'MemberID');
*/
function __construct($dataClass, $joinTable, $localKey, $foreignKey, $extraFields = array()) {
parent::__construct($dataClass);

15
tests/model/DataListTest.php
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@ -1,6 +1,7 @@
<?php
class DataListTest extends SapphireTest {
// Borrow the model from DataObjectTest
static $fixture_file = 'DataObjectTest.yml';
@ -16,6 +17,20 @@ class DataListTest extends SapphireTest {
'DataObjectTest_TeamComment'
);
public function testSubtract(){
$subtractList = DataList::create("DataObjectTest_TeamComment")->filter('ID',1);
$fullList = DataList::create("DataObjectTest_TeamComment");
$newList = $fullList->subtract($subtractList);
$this->assertEquals(2, $newList->Count(), 'List should only contain two objects after subtraction');
}
public function testSubtractBadDataclassThrowsException(){
$this->setExpectedException('InvalidArgumentException');
$teamsComments = DataList::create("DataObjectTest_TeamComment");
$teams = DataList::create("DataObjectTest_Team");
$teamsComments->subtract($teams);
}
function testListCreationSortAndLimit() {
// By default, a DataList will contain all items of that class
$list = DataList::create('DataObjectTest_TeamComment')->sort('ID');

67
tests/model/DataObjectTest.php
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@ -272,73 +272,6 @@ class DataObjectTest extends SapphireTest {
$this->assertEquals($team1->getComponent('Captain')->FirstName, 'Player 1', 'Player 1 is the captain');
}
/**
* @todo Test removeMany() and addMany() on $many_many relationships
*/
function testManyManyRelationships() {
$player1 = $this->objFromFixture('DataObjectTest_Player', 'player1');
$player2 = $this->objFromFixture('DataObjectTest_Player', 'player2');
$team1 = $this->objFromFixture('DataObjectTest_Team', 'team1');
$team2 = $this->objFromFixture('DataObjectTest_Team', 'team2');
// Test adding single DataObject by reference
$player1->Teams()->add($team1);
$player1->flushCache();
$compareTeams = new ManyManyList('DataObjectTest_Team','DataObjectTest_Team_Players', 'DataObjectTest_TeamID', 'DataObjectTest_PlayerID');
$compareTeams->forForeignID($player1->ID);
$compareTeams->byID($team1->ID);
$this->assertEquals(
$player1->Teams()->column('ID'),
$compareTeams->column('ID'),
"Adding single record as DataObject to many_many"
);
// test removing single DataObject by reference
$player1->Teams()->remove($team1);
$player1->flushCache();
$compareTeams = new ManyManyList('DataObjectTest_Team','DataObjectTest_Team_Players', 'DataObjectTest_TeamID', 'DataObjectTest_PlayerID');
$compareTeams->forForeignID($player1->ID);
$compareTeams->byID($team1->ID);
$this->assertEquals(
$player1->Teams()->column('ID'),
$compareTeams->column('ID'),
"Removing single record as DataObject from many_many"
);
// test adding single DataObject by ID
$player1->Teams()->add($team1->ID);
$player1->flushCache();
$compareTeams = new ManyManyList('DataObjectTest_Team','DataObjectTest_Team_Players', 'DataObjectTest_TeamID', 'DataObjectTest_PlayerID');
$compareTeams->forForeignID($player1->ID);
$compareTeams->byID($team1->ID);
$this->assertEquals(
$player1->Teams()->column('ID'),
$compareTeams->column('ID'),
"Adding single record as ID to many_many"
);
// test removing single DataObject by ID
$player1->Teams()->removeByID($team1->ID);
$player1->flushCache();
$compareTeams = new ManyManyList('DataObjectTest_Team','DataObjectTest_Team_Players', 'DataObjectTest_TeamID', 'DataObjectTest_PlayerID');
$compareTeams->forForeignID($player1->ID);
$compareTeams->byID($team1->ID);
$this->assertEquals(
$player1->Teams()->column('ID'),
$compareTeams->column('ID'),
"Removing single record as ID from many_many"
);
// Set a many-many relationship by and idList
$player1->Teams()->setByIdList(array($team1->ID, $team2->ID));
$this->assertEquals(array($team1->ID, $team2->ID), $player1->Teams()->column());
$player1->Teams()->setByIdList(array($team1->ID));
$this->assertEquals(array($team1->ID), $player1->Teams()->column());
$player1->Teams()->setByIdList(array($team2->ID));
$this->assertEquals(array($team2->ID), $player1->Teams()->column());
}
/**
* @todo Extend type change tests (e.g. '0'==NULL)
*/

98
tests/model/ManyManyListTest.php Normal file
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@ -0,0 +1,98 @@
<?php
class ManyManyListTest extends SapphireTest {
// Borrow the model from DataObjectTest
public static $fixture_file = 'DataObjectTest.yml';
protected $extraDataObjects = array(
'DataObjectTest_Team',
'DataObjectTest_SubTeam',
'DataObjectTest_Player',
);
public function testCreateList() {
$list = ManyManyList::create('DataObjectTest_Team','DataObjectTest_Team_Players', 'DataObjectTest_TeamID', 'DataObjectTest_PlayerID');
$this->assertEquals(2, $list->count());
}
public function testAddingSingleDataObjectByReference() {
$player1 = $this->objFromFixture('DataObjectTest_Player', 'player1');
$team1 = $this->objFromFixture('DataObjectTest_Team', 'team1');
$player1->Teams()->add($team1);
$player1->flushCache();
$compareTeams = new ManyManyList('DataObjectTest_Team','DataObjectTest_Team_Players', 'DataObjectTest_TeamID', 'DataObjectTest_PlayerID');
$compareTeams->forForeignID($player1->ID);
$compareTeams->byID($team1->ID);
$this->assertEquals($player1->Teams()->column('ID'),$compareTeams->column('ID'),"Adding single record as DataObject to many_many");
}
public function testRemovingSingleDataObjectByReference() {
$player1 = $this->objFromFixture('DataObjectTest_Player', 'player1');
$team1 = $this->objFromFixture('DataObjectTest_Team', 'team1');
$player1->Teams()->remove($team1);
$player1->flushCache();
$compareTeams = new ManyManyList('DataObjectTest_Team','DataObjectTest_Team_Players', 'DataObjectTest_TeamID', 'DataObjectTest_PlayerID');
$compareTeams->forForeignID($player1->ID);
$compareTeams->byID($team1->ID);
$this->assertEquals($player1->Teams()->column('ID'),$compareTeams->column('ID'),"Removing single record as DataObject from many_many");
}
public function testAddingSingleDataObjectByID() {
$player1 = $this->objFromFixture('DataObjectTest_Player', 'player1');
$team1 = $this->objFromFixture('DataObjectTest_Team', 'team1');
$player1->Teams()->add($team1->ID);
$player1->flushCache();
$compareTeams = new ManyManyList('DataObjectTest_Team','DataObjectTest_Team_Players', 'DataObjectTest_TeamID', 'DataObjectTest_PlayerID');
$compareTeams->forForeignID($player1->ID);
$compareTeams->byID($team1->ID);
$this->assertEquals($player1->Teams()->column('ID'), $compareTeams->column('ID'), "Adding single record as ID to many_many");
}
public function testRemoveByID() {
$player1 = $this->objFromFixture('DataObjectTest_Player', 'player1');
$team1 = $this->objFromFixture('DataObjectTest_Team', 'team1');
$player1->Teams()->removeByID($team1->ID);
$player1->flushCache();
$compareTeams = new ManyManyList('DataObjectTest_Team','DataObjectTest_Team_Players', 'DataObjectTest_TeamID', 'DataObjectTest_PlayerID');
$compareTeams->forForeignID($player1->ID);
$compareTeams->byID($team1->ID);
$this->assertEquals($player1->Teams()->column('ID'), $compareTeams->column('ID'), "Removing single record as ID from many_many");
}
public function testSetByIdList() {
$player1 = $this->objFromFixture('DataObjectTest_Player', 'player1');
$team1 = $this->objFromFixture('DataObjectTest_Team', 'team1');
$team2 = $this->objFromFixture('DataObjectTest_Team', 'team2');
$player1->Teams()->setByIdList(array($team1->ID, $team2->ID));
$this->assertEquals(array($team1->ID, $team2->ID), $player1->Teams()->column());
$player1->Teams()->setByIdList(array($team1->ID));
$this->assertEquals(array($team1->ID), $player1->Teams()->column());
$player1->Teams()->setByIdList(array($team2->ID));
$this->assertEquals(array($team2->ID), $player1->Teams()->column());
}
public function testSubtractOnAManyManyList() {
$allList = ManyManyList::create('DataObjectTest_Player', 'DataObjectTest_Team_Players','DataObjectTest_PlayerID', 'DataObjectTest_TeamID');
$this->assertEquals(3, $allList->count(), 'Precondition; we have all 3 players connected to a team in the list');
$teamOneID = $this->idFromFixture('DataObjectTest_Team', 'team1');
$teamTwoID = $this->idFromFixture('DataObjectTest_Team', 'team2');
// Captain 1 belongs to one team; team1
$captain1 = $this->objFromFixture('DataObjectTest_Player', 'captain1');
$this->assertEquals(array($teamOneID),$captain1->Teams()->column("ID"), 'Precondition; player2 belongs to team1');
// Player 2 belongs to both teams: team1, team2
$player2 = $this->objFromFixture('DataObjectTest_Player', 'player2');
$this->assertEquals(array($teamOneID,$teamTwoID), $player2->Teams()->column("ID"), 'Precondition; player2 belongs to team1 and team2');
// We want to find the teams for player2 where the captain does not belong to
$teamsWithoutTheCaptain = $player2->Teams()->subtract($captain1->Teams());
// Assertions
$this->assertEquals(1,$teamsWithoutTheCaptain->count(), 'The ManyManyList should onlu contain one team');
$this->assertEquals($teamTwoID, $teamsWithoutTheCaptain->first()->ID, 'The ManyManyList contains the wrong team');
}
}