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Guite  
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 More options Jun 3 2012, 7:06 am
From: Guite <guitezik...@googlemail.com>
Date: Sun, 3 Jun 2012 04:06:46 -0700 (PDT)
Local: Sun, Jun 3 2012 7:06 am
Subject: Filtering problem
Print | Individual message | Show original | Report this message | Find messages by this author

Hello,

I have a problem with creating a certain query covering three different
entities:

   - Recipe
   - Ingredient
   - RecipeIngredient

A recipe and an ingredient both have many recipe ingredients - both
relations are bidirectional.

In PHP I have an array with multiple ingredient ids and I want to fetch
only those recipes having ALL of these ingredients.

In the following tblIngredients means the list of recipe ingredients seen
from the recipe side.

First I tried something like:
        if (!empty($ingredients)) {
            $ingredientIds = explode('-', $ingredients);
            foreach ($ingredientIds as $ingredientId) {
                $qb->andWhere('tblIngredients.ingredient = :ingredientId')
                     ->setParameter('ingredientId', $ingredientId);
            }
        }
But this did not work because there isn't any single ingredient having all
the given ingredient ids. Therefore the result was always empty.

My next attempt was:
        if (!empty($ingredients)) {
            $ingredientIds = explode('-', $ingredients);
            foreach ($ingredientIds as $ingredientId) {
                $qb->andWhere(':ingredientId MEMBER OF
tblIngredients.ingredient')
                     ->setParameter('ingredientId', $ingredientId);
            }
        }
which caused an error because tblIngredients.ingredient is not multi-valued.

So I tried this:
        if (!empty($ingredients)) {
            $ingredientIds = explode('-', $ingredients);
            $i = 0;
            foreach ($ingredientIds as $ingredientId) {
                $i++;
                $qb2 = $this->getEntityManager()->createQueryBuilder();
                $qb2->select('tblRecipeIngredients' . $i . '.ingredient')
                    ->from('MyEntity_RecipeIngredient',
'tblRecipeIngredients' . $i)
                    ->where('tblRecipeIngredients' . $i . '.ingredient =
:ingredientId')
                    ->setParameter('ingredientId', $ingredientId)
                    ->andWhere('tblRecipeIngredients' . $i . '.recipe =
tbl.id');
                $qb->andWhere($qb->expr()->exists($qb2->getDql()));
            }
        }

which gives me another error:

[Semantical Error] line 0, col 280 near 'ingredient FROM': Error: Invalid
PathExpression. Must be a StateFieldPathExpression.

   - #0 Exception in
   /var/customers/webs/GuiteLab/multiCMS/plugins/Doctrine/lib/vendor/Doctrine/ ORM/Query/QueryException.php,
   Zeile 47
   - #1 /var/.../Doctrine/ORM/Query/Parser.php(717):
   Doctrine\ORM\Query\Parser->semanticalError('Invalid PathExp...', Array)
   - #2 /var/.../Doctrine/ORM/Query/Parser.php(221):
   Doctrine\ORM\Query\Parser->_processDeferredPathExpressions(Object(Doctrine\ ORM\Query\AST\SelectStatement))
   - #3 /var/.../Doctrine/ORM/Query/Parser.php(281):
   Doctrine\ORM\Query\Parser->getAST()
   - #4 /var/.../Doctrine/ORM/Query.php(213):
   Doctrine\ORM\Query\Parser->parse()
   - #5 /var/.../Doctrine/ORM/Query.php(234): Doctrine\ORM\Query->_parse()
   - #6 /var/.../Doctrine/ORM/AbstractQuery.php(607):
   Doctrine\ORM\Query->_doExecute()
   - #7 /var/.../Doctrine/ORM/AbstractQuery.php(480):
   Doctrine\ORM\AbstractQuery->execute(Array, 4)
   - #8 /var/.../Doctrine/ORM/AbstractQuery.php(506):
   Doctrine\ORM\AbstractQuery->getSingleResult(4)
   - #9
   /var/.../DoctrineExtensions/lib/DoctrineExtensions/Paginate/Paginate.php(40 ):
   Doctrine\ORM\AbstractQuery->getSingleScalarResult()

Can anybody help me with this challenge, please?

I am using Doctrine 2.1.5.

TIA,
Axel


 
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Marco Pivetta  
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 More options Jun 3 2012, 8:23 am
From: Marco Pivetta <ocram...@gmail.com>
Date: Sun, 3 Jun 2012 14:23:03 +0200
Local: Sun, Jun 3 2012 8:23 am
Subject: Re: [doctrine-user] Filtering problem
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What is your "tblRecipeIngredients$i.ingredient"? Is it an association?

Anyway, the approach seems correct, even if it requires a lot of DQL (not
that I can think of an SQL solution right now).

Marco Pivetta

http://twitter.com/Ocramius

http://marco-pivetta.com

On 3 June 2012 13:06, Guite <guitezik...@googlemail.com> wrote:


 
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guilhermeblanco@gmail.com  
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 More options Jun 3 2012, 11:39 am
From: "guilhermebla...@gmail.com" <guilhermebla...@gmail.com>
Date: Sun, 3 Jun 2012 11:39:57 -0400
Local: Sun, Jun 3 2012 11:39 am
Subject: Re: [doctrine-user] Filtering problem
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If you're able to upgrade to master, you can do:

IDENTITY(tblRecipeIngredients$i.ingredient)

Otherwise, you are forced to JOIN the ingredient and then grab its id.

--
Guilherme Blanco
MSN: guilhermebla...@hotmail.com
GTalk: guilhermeblanco
Toronto - ON/Canada

 
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Menno Holtkamp  
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 More options Jun 3 2012, 12:57 pm
From: Menno Holtkamp <menno.holtk...@gmail.com>
Date: Sun, 3 Jun 2012 13:57:52 -0300
Local: Sun, Jun 3 2012 12:57 pm
Subject: Re: [doctrine-user] Filtering problem
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Not really a solution, but did you check the generated SQL? It seems that
in your first 2 attempts you re-use a named parameter, which probably
overwrites the values...

Third attempt seems right, will check some code of mine on Monday, problem
sounds familiar...
On Jun 3, 2012 8:06 AM, "Guite" <guitezik...@googlemail.com> wrote:


 
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Guite  
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 More options Jun 5 2012, 8:23 am
From: Guite <guitezik...@googlemail.com>
Date: Tue, 5 Jun 2012 05:23:12 -0700 (PDT)
Local: Tues, Jun 5 2012 8:23 am
Subject: Re: Filtering problem
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Thank you all for your answers.

I got it working thanks to the hint from Guilherme Blanco that I must join
the ingredient table, too.

Here is how it works now:

        $qb = ...; // query builder for the recipe table with alias tbl

        if (!empty($ingredients)) {
            $ingredientIds = explode('-', $ingredients);
            $i = 0;
            foreach ($ingredientIds as $ingredientId) {
                $i++;
                $riTable = 'tblRecipeIngredients' . $i;
                $ingredientTable = 'tblIngredient' . $i;
                $qb2 = $this->getEntityManager()->createQueryBuilder();
                $qb2->select($ingredientTable . '.id')
                    ->from('Entity_RecipeIngredient', $riTable)
                    ->leftJoin($riTable . '.ingredient', $ingredientTable)
                    ->where($ingredientTable . '.id = ' . $ingredientId)
                    ->andWhere($riTable . '.recipe = tbl.id'); // tbl.id ==
recipe.id

                // add sub query to main query
                $qb->andWhere($qb->expr()->exists($qb2->getDql()));
            }
        }

Regards,
Axel


 
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