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50 lines
1.7 KiB
PHP
50 lines
1.7 KiB
PHP
<?php
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/*
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* Copyright (C) 2017 Champs Libres Cooperative <info@champs-libres.coop>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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namespace Chill\MainBundle\Doctrine\DQL;
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use Doctrine\ORM\Query\AST\Functions\FunctionNode;
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use Doctrine\ORM\Query\Lexer;
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use Doctrine\ORM\Query\Parser;
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use Doctrine\ORM\Query\SqlWalker;
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/**
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* Return an aggregation of values in a json representation, as a string.
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*
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* Internally, this function use the postgresql `jsonb_agg` function. Using
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* json allow to aggregate data from different types without have to cast them.
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*
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* @author Julien Fastré <julien.fastre@champs-libres.coop>
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*/
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class JsonAggregate extends FunctionNode
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{
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private $expr;
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public function getSql(SqlWalker $sqlWalker)
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{
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return sprintf('jsonb_agg(%s)', $this->expr->dispatch($sqlWalker));
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}
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public function parse(Parser $parser)
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{
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$parser->match(Lexer::T_IDENTIFIER);
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$parser->match(Lexer::T_OPEN_PARENTHESIS);
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$this->expr = $parser->StringPrimary();
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$parser->match(Lexer::T_CLOSE_PARENTHESIS);
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}
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}
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