1. mongodb的where中有比較丰富的 条件。例如以下：

 static $builders = [
            'NOT' => 'buildNotCondition',
            'AND' => 'buildAndCondition',
            'OR' => 'buildOrCondition',
            'BETWEEN' => 'buildBetweenCondition',
            'NOT BETWEEN' => 'buildBetweenCondition',
            'IN' => 'buildInCondition',
            'NOT IN' => 'buildInCondition',
            'REGEX' => 'buildRegexCondition',
            'LIKE' => 'buildLikeCondition',
			
        ];

增加函数部分为：

在vendor/yiisoft/yii2-mongodb/collection.php

增加函数：

	public function buildGtCondition($operator, $operands)
    {
        if (!isset($operands[0], $operands[1])) {
            throw new InvalidParamException("Operator '$operator' requires two operands.");
        }
        list($column, $value) = $operands;
        return [$column => ['?gt' => $value]];
    }
	
	
	public function buildGteCondition($operator, $operands)
    {
        if (!isset($operands[0], $operands[1])) {
            throw new InvalidParamException("Operator '$operator' requires two operands.");
        }
        list($column, $value) = $operands;
        return [$column => ['?gte' => $value]];
    }
	
	
	public function buildLtCondition($operator, $operands)
    {
        if (!isset($operands[0], $operands[1])) {
            throw new InvalidParamException("Operator '$operator' requires two operands.");
        }
        list($column, $value) = $operands;
        return [$column => ['?lt' => $value]];
    }
	
	public function buildLteCondition($operator, $operands)
    {
        if (!isset($operands[0], $operands[1])) {
            throw new InvalidParamException("Operator '$operator' requires two operands.");
        }
        list($column, $value) = $operands;
        return [$column => ['?
lte' => $value]];
    }

 public function buildCondition($condition)
    {
        static $builders = [
            'NOT' => 'buildNotCondition',
            'AND' => 'buildAndCondition',
            'OR' => 'buildOrCondition',
            'BETWEEN' => 'buildBetweenCondition',
            'NOT BETWEEN' => 'buildBetweenCondition',
            'IN' => 'buildInCondition',
            'NOT IN' => 'buildInCondition',
            'REGEX' => 'buildRegexCondition',
            'LIKE' => 'buildLikeCondition',
			'>' 	=> 'buildGtCondition',
			'>='	=> 'buildGteCondition',
			'<' 	=> 'buildLtCondition',
			'<=' 	=> 'buildLteCondition',
        ];

最后collection.php的代码例如以下：

<?
php
/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace yii\mongodb;

use yii\base\InvalidParamException;
use yii\base\Object;
use Yii;

/**
 * Collection represents the Mongo collection information.
 *
 * A collection object is usually created by calling [[Database::getCollection()]] or [[Connection::getCollection()]].
 *
 * Collection provides the basic interface for the Mongo queries, mostly: insert, update, delete operations.
 * For example:
 *
 * ~~~
 * $collection = Yii::$app->mongodb->getCollection('customer');
 * $collection->insert(['name' => 'John Smith', 'status' => 1]);
 * ~~~
 *
 * To perform "find" queries, please use [[Query]] instead.
 *
 * Mongo uses JSON format to specify query conditions with quite specific syntax.
 * However Collection class provides the ability of "translating" common condition format used "yii\db\*"
 * into Mongo condition.
 * For example:
 * ~~~
 * $condition = [
 *     [
 *         'OR',
 *         ['AND', ['first_name' => 'John'], ['last_name' => 'Smith']],
 *         ['status' => [1, 2, 3]]
 *     ],
 * ];
 * print_r($collection->buildCondition($condition));
 * // outputs :
 * [
 *     '$or' => [
 *         [
 *             'first_name' => 'John',
 *             'last_name' => 'John',
 *         ],
 *         [
 *             'status' => ['$in' => [1, 2, 3]],
 *         ]
 *     ]
 * ]
 * ~~~
 *
 * Note: condition values for the key '_id' will be automatically cast to [[\MongoId]] instance,
 * even if they are plain strings. However, if you have other columns, containing [[\MongoId]], you
 * should take care of possible typecast on your own.
 *
 * @property string $fullName Full name of this collection, including database name. This property is
 * read-only.
 * @property array $lastError Last error information. This property is read-only.
 * @property string $name Name of this collection. This property is read-only.
 *
 * @author Paul Klimov <klimov.paul@gmail.com>
 * @since 2.0
 */
class Collection extends Object
{
    /**
     * @var \MongoCollection Mongo collection instance.
     */
    public $mongoCollection;


    /**
     * @return string name of this collection.
     */
    public function getName()
    {
        return $this->mongoCollection->getName();
    }

    /**
     * @return string full name of this collection, including database name.
     */
    public function getFullName()
    {
        return $this->mongoCollection->__toString();
    }

    /**
     * @return array last error information.
     */
    public function getLastError()
    {
        return $this->mongoCollection->db->lastError();
    }

    /**
     * Composes log/profile token.
     * @param string $command command name
     * @param array $arguments command arguments.
     * @return string token.
     */
    protected function composeLogToken($command, $arguments = [])
    {
        $parts = [];
        foreach ($arguments as $argument) {
            $parts[] = is_scalar($argument) ?
 $argument : $this->encodeLogData($argument);
        }

        return $this->getFullName() . '.' . $command . '(' . implode(', ', $parts) . ')';
    }

    /**
     * Encodes complex log data into JSON format string.
     * @param mixed $data raw data.
     * @return string encoded data string.
     */
    protected function encodeLogData($data)
    {
        return json_encode($this->processLogData($data));
    }

    /**
     * Pre-processes the log data before sending it to `json_encode()`.
     * @param mixed $data raw data.
     * @return mixed the processed data.
     */
    protected function processLogData($data)
    {
        if (is_object($data)) {
            if ($data instanceof \MongoId ||
                $data instanceof \MongoRegex ||
                $data instanceof \MongoDate ||
                $data instanceof \MongoInt32 ||
                $data instanceof \MongoInt64 ||
                $data instanceof \MongoTimestamp
            ) {
                $data = http://www.mamicode.com/get_class($data) . '(' . $data->__toString() . ')';>
 $data['_id'] : $data->_id;
        } catch (\Exception $e) {
            Yii::endProfile($token, __METHOD__);
            throw new Exception($e->getMessage(), (int) $e->getCode(), $e);
        }
    }

    /**
     * Removes data from the collection.
     * @param array $condition description of records to remove.
     * @param array $options list of options in format: optionName => optionValue.
     * @return integer|boolean number of updated documents or whether operation was successful.
     * @throws Exception on failure.
     * @see http://www.php.net/manual/en/mongocollection.remove.php
     */
    public function remove($condition = [], $options = [])
    {
        $condition = $this->buildCondition($condition);
        $options = array_merge(['w' => 1, 'justOne' => false], $options);
        $token = $this->composeLogToken('remove', [$condition, $options]);
        Yii::info($token, __METHOD__);
        try {
            Yii::beginProfile($token, __METHOD__);
            $result = $this->mongoCollection->remove($condition, $options);
            $this->tryResultError($result);
            Yii::endProfile($token, __METHOD__);
            if (is_array($result) && array_key_exists('n', $result)) {
                return $result['n'];
            } else {
                return true;
            }
        } catch (\Exception $e) {
            Yii::endProfile($token, __METHOD__);
            throw new Exception($e->getMessage(), (int) $e->getCode(), $e);
        }
    }

    /**
     * Returns a list of distinct values for the given column across a collection.
     * @param string $column column to use.
     * @param array $condition query parameters.
     * @return array|boolean array of distinct values, or "false" on failure.
     * @throws Exception on failure.
     */
    public function distinct($column, $condition = [])
    {
        $condition = $this->buildCondition($condition);
        $token = $this->composeLogToken('distinct', [$column, $condition]);
        Yii::info($token, __METHOD__);
        try {
            Yii::beginProfile($token, __METHOD__);
            $result = $this->mongoCollection->distinct($column, $condition);
            Yii::endProfile($token, __METHOD__);

            return $result;
        } catch (\Exception $e) {
            Yii::endProfile($token, __METHOD__);
            throw new Exception($e->getMessage(), (int) $e->getCode(), $e);
        }
    }

    /**
     * Performs aggregation using Mongo Aggregation Framework.
     * @param array $pipeline list of pipeline operators, or just the first operator
     * @param array $pipelineOperator additional pipeline operator. You can specify additional
     * pipelines via third argument, fourth argument etc.
     * @return array the result of the aggregation.
     * @throws Exception on failure.
     * @see http://docs.mongodb.org/manual/applications/aggregation/
     */
    public function aggregate($pipeline, $pipelineOperator = [])
    {
        $args = func_get_args();
        $token = $this->composeLogToken('aggregate', $args);
        Yii::info($token, __METHOD__);
        try {
            Yii::beginProfile($token, __METHOD__);
            $result = call_user_func_array([$this->mongoCollection, 'aggregate'], $args);
            $this->tryResultError($result);
            Yii::endProfile($token, __METHOD__);

            return $result['result'];
        } catch (\Exception $e) {
            Yii::endProfile($token, __METHOD__);
            throw new Exception($e->getMessage(), (int) $e->getCode(), $e);
        }
    }

    /**
     * Performs aggregation using Mongo "group" command.
     * @param mixed $keys fields to group by. If an array or non-code object is passed,
     * it will be the key used to group results. If instance of [[\MongoCode]] passed,
     * it will be treated as a function that returns the key to group by.
     * @param array $initial Initial value of the aggregation counter object.
     * @param \MongoCode|string $reduce function that takes two arguments (the current
     * document and the aggregation to this point) and does the aggregation.
     * Argument will be automatically cast to [[\MongoCode]].
     * @param array $options optional parameters to the group command. Valid options include:
     *  - condition - criteria for including a document in the aggregation.
     *  - finalize - function called once per unique key that takes the final output of the reduce function.
     * @return array the result of the aggregation.
     * @throws Exception on failure.
     * @see http://docs.mongodb.org/manual/reference/command/group/
     */
    public function group($keys, $initial, $reduce, $options = [])
    {
        if (!($reduce instanceof \MongoCode)) {
            $reduce = new \MongoCode((string) $reduce);
        }
        if (array_key_exists('condition', $options)) {
            $options['condition'] = $this->buildCondition($options['condition']);
        }
        if (array_key_exists('finalize', $options)) {
            if (!($options['finalize'] instanceof \MongoCode)) {
                $options['finalize'] = new \MongoCode((string) $options['finalize']);
            }
        }
        $token = $this->composeLogToken('group', [$keys, $initial, $reduce, $options]);
        Yii::info($token, __METHOD__);
        try {
            Yii::beginProfile($token, __METHOD__);
            // Avoid possible E_DEPRECATED for $options:
            if (empty($options)) {
                $result = $this->mongoCollection->group($keys, $initial, $reduce);
            } else {
                $result = $this->mongoCollection->group($keys, $initial, $reduce, $options);
            }
            $this->tryResultError($result);

            Yii::endProfile($token, __METHOD__);
            if (array_key_exists('retval', $result)) {
                return $result['retval'];
            } else {
                return [];
            }
        } catch (\Exception $e) {
            Yii::endProfile($token, __METHOD__);
            throw new Exception($e->getMessage(), (int) $e->getCode(), $e);
        }
    }

    /**
     * Performs aggregation using Mongo "map reduce" mechanism.
     * Note: this function will not return the aggregation result, instead it will
     * write it inside the another Mongo collection specified by "out" parameter.
     * For example:
     *
     * ~~~
     * $customerCollection = Yii::$app->mongo->getCollection('customer');
     * $resultCollectionName = $customerCollection->mapReduce(
     *     'function () {emit(this.status, this.amount)}',
     *     'function (key, values) {return Array.sum(values)}',
     *     'mapReduceOut',
     *     ['status' => 3]
     * );
     * $query = new Query();
     * $results = $query->from($resultCollectionName)->all();
     * ~~~
     *
     * @param \MongoCode|string $map function, which emits map data from collection.
     * Argument will be automatically cast to [[\MongoCode]].
     * @param \MongoCode|string $reduce function that takes two arguments (the map key
     * and the map values) and does the aggregation.
     * Argument will be automatically cast to [[\MongoCode]].
     * @param string|array $out output collection name. It could be a string for simple output
     * ('outputCollection'), or an array for parametrized output (['merge' => 'outputCollection']).
     * You can pass ['inline' => true] to fetch the result at once without temporary collection usage.
     * @param array $condition criteria for including a document in the aggregation.
     * @param array $options additional optional parameters to the mapReduce command. Valid options include:
     *  - sort - array - key to sort the input documents. The sort key must be in an existing index for this collection.
     *  - limit - the maximum number of documents to return in the collection.
     *  - finalize - function, which follows the reduce method and modifies the output.
     *  - scope - array - specifies global variables that are accessible in the map, reduce and finalize functions.
     *  - jsMode - boolean -Specifies whether to convert intermediate data into BSON format between the execution of the map and reduce functions.
     *  - verbose - boolean - specifies whether to include the timing information in the result information.
     * @return string|array the map reduce output collection name or output results.
     * @throws Exception on failure.
     */
    public function mapReduce($map, $reduce, $out, $condition = [], $options = [])
    {
        if (!($map instanceof \MongoCode)) {
            $map = new \MongoCode((string) $map);
        }
        if (!($reduce instanceof \MongoCode)) {
            $reduce = new \MongoCode((string) $reduce);
        }
        $command = [
            'mapReduce' => $this->getName(),
            'map' => $map,
            'reduce' => $reduce,
            'out' => $out
        ];
        if (!empty($condition)) {
            $command['query'] = $this->buildCondition($condition);
        }
        if (array_key_exists('finalize', $options)) {
            if (!($options['finalize'] instanceof \MongoCode)) {
                $options['finalize'] = new \MongoCode((string) $options['finalize']);
            }
        }
        if (!empty($options)) {
            $command = array_merge($command, $options);
        }
        $token = $this->composeLogToken('mapReduce', [$map, $reduce, $out]);
        Yii::info($token, __METHOD__);
        try {
            Yii::beginProfile($token, __METHOD__);
            $command = array_merge(['mapReduce' => $this->getName()], $command);
            $result = $this->mongoCollection->db->command($command);
            $this->tryResultError($result);
            Yii::endProfile($token, __METHOD__);

            return array_key_exists('results', $result) ?
 $result['results'] : $result['result'];
        } catch (\Exception $e) {
            Yii::endProfile($token, __METHOD__);
            throw new Exception($e->getMessage(), (int) $e->getCode(), $e);
        }
    }

    /**
     * Performs full text search.
     * @param string $search string of terms that MongoDB parses and uses to query the text index.
     * @param array $condition criteria for filtering a results list.
     * @param array $fields list of fields to be returned in result.
     * @param array $options additional optional parameters to the mapReduce command. Valid options include:
     *  - limit - the maximum number of documents to include in the response (by default 100).
     *  - language - the language that determines the list of stop words for the search
     *    and the rules for the stemmer and tokenizer. If not specified, the search uses the default
     *    language of the index.
     * @return array the highest scoring documents, in descending order by score.
     * @throws Exception on failure.
     */
    public function fullTextSearch($search, $condition = [], $fields = [], $options = [])
    {
        $command = [
            'search' => $search
        ];
        if (!empty($condition)) {
            $command['filter'] = $this->buildCondition($condition);
        }
        if (!empty($fields)) {
            $command['project'] = $fields;
        }
        if (!empty($options)) {
            $command = array_merge($command, $options);
        }
        $token = $this->composeLogToken('text', $command);
        Yii::info($token, __METHOD__);
        try {
            Yii::beginProfile($token, __METHOD__);
            $command = array_merge(['text' => $this->getName()], $command);
            $result = $this->mongoCollection->db->command($command);
            $this->tryResultError($result);
            Yii::endProfile($token, __METHOD__);

            return $result['results'];
        } catch (\Exception $e) {
            Yii::endProfile($token, __METHOD__);
            throw new Exception($e->getMessage(), (int) $e->getCode(), $e);
        }
    }

    /**
     * Checks if command execution result ended with an error.
     * @param mixed $result raw command execution result.
     * @throws Exception if an error occurred.
     */
    protected function tryResultError($result)
    {
        if (is_array($result)) {
            if (!empty($result['errmsg'])) {
                $errorMessage = $result['errmsg'];
            } elseif (!empty($result['err'])) {
                $errorMessage = $result['err'];
            }
            if (isset($errorMessage)) {
                if (array_key_exists('code', $result)) {
                    $errorCode = (int) $result['code'];
                } elseif (array_key_exists('ok', $result)) {
                    $errorCode = (int) $result['ok'];
                } else {
                    $errorCode = 0;
                }
                throw new Exception($errorMessage, $errorCode);
            }
        } elseif (!$result) {
            throw new Exception('Unknown error, use "w=1" option to enable error tracking');
        }
    }

    /**
     * Throws an exception if there was an error on the last operation.
     * @throws Exception if an error occurred.
     */
    protected function tryLastError()
    {
        $this->tryResultError($this->getLastError());
    }

    /**
     * Converts "\yii\db\*" quick condition keyword into actual Mongo condition keyword.
     * @param string $key raw condition key.
     * @return string actual key.
     */
    protected function normalizeConditionKeyword($key)
    {
        static $map = [
            'AND' => '$and',
            'OR' => '$or',
            'IN' => '$in',
            'NOT IN' => '$nin',
        ];
        $matchKey = strtoupper($key);
        if (array_key_exists($matchKey, $map)) {
            return $map[$matchKey];
        } else {
            return $key;
        }
    }

    /**
     * Converts given value into [[MongoId]] instance.
     * If array given, each element of it will be processed.
     * @param mixed $rawId raw id(s).
     * @return array|\MongoId normalized id(s).
     */
    protected function ensureMongoId($rawId)
    {
        if (is_array($rawId)) {
            $result = [];
            foreach ($rawId as $key => $value) {
                $result[$key] = $this->ensureMongoId($value);
            }

            return $result;
        } elseif (is_object($rawId)) {
            if ($rawId instanceof \MongoId) {
                return $rawId;
            } else {
                $rawId = (string) $rawId;
            }
        }
        try {
            $mongoId = new \MongoId($rawId);
        } catch (\MongoException $e) {
            // invalid id format
            $mongoId = $rawId;
        }

        return $mongoId;
    }
	
	
	public function buildGtCondition($operator, $operands)
    {
        if (!isset($operands[0], $operands[1])) {
            throw new InvalidParamException("Operator '$operator' requires two operands.");
        }
        list($column, $value) = $operands;
        return [$column => ['?gt' => $value]];
    }
	
	
	public function buildGteCondition($operator, $operands)
    {
        if (!isset($operands[0], $operands[1])) {
            throw new InvalidParamException("Operator '$operator' requires two operands.");
        }
        list($column, $value) = $operands;
        return [$column => ['?gte' => $value]];
    }
	
	
	public function buildLtCondition($operator, $operands)
    {
        if (!isset($operands[0], $operands[1])) {
            throw new InvalidParamException("Operator '$operator' requires two operands.");
        }
        list($column, $value) = $operands;
        return [$column => ['?lt' => $value]];
    }
	
	public function buildLteCondition($operator, $operands)
    {
        if (!isset($operands[0], $operands[1])) {
            throw new InvalidParamException("Operator '$operator' requires two operands.");
        }
        list($column, $value) = $operands;
        return [$column => ['?
lte' => $value]];
    }

    /**
     * Parses the condition specification and generates the corresponding Mongo condition.
     * @param array $condition the condition specification. Please refer to [[Query::where()]]
     * on how to specify a condition.
     * @return array the generated Mongo condition
     * @throws InvalidParamException if the condition is in bad format
     */
    public function buildCondition($condition)
    {
        static $builders = [
            'NOT' => 'buildNotCondition',
            'AND' => 'buildAndCondition',
            'OR' => 'buildOrCondition',
            'BETWEEN' => 'buildBetweenCondition',
            'NOT BETWEEN' => 'buildBetweenCondition',
            'IN' => 'buildInCondition',
            'NOT IN' => 'buildInCondition',
            'REGEX' => 'buildRegexCondition',
            'LIKE' => 'buildLikeCondition',
			'>' 	=> 'buildGtCondition',
			'>='	=> 'buildGteCondition',
			'<' 	=> 'buildLtCondition',
			'<=' 	=> 'buildLteCondition',
        ];

        if (!is_array($condition)) {
            throw new InvalidParamException('Condition should be an array.');
        } elseif (empty($condition)) {
            return [];
        }
        if (isset($condition[0])) { // operator format: operator, operand 1, operand 2, ...
            $operator = strtoupper($condition[0]);
            if (isset($builders[$operator])) {
                $method = $builders[$operator];
                array_shift($condition);

                return $this->$method($operator, $condition);
            } else {
                throw new InvalidParamException('Found unknown operator in query: ' . $operator);
            }
        } else {
            // hash format: 'column1' => 'value1', 'column2' => 'value2', ...
            return $this->buildHashCondition($condition);
        }
    }

    /**
     * Creates a condition based on column-value pairs.
     * @param array $condition the condition specification.
     * @return array the generated Mongo condition.
     */
    public function buildHashCondition($condition)
    {
        $result = [];
        foreach ($condition as $name => $value) {
            if (strncmp('$', $name, 1) === 0) {
                // Native Mongo condition:
                $result[$name] = $value;
            } else {
                if (is_array($value)) {
                    if (array_key_exists(0, $value)) {
                        // Quick IN condition:
                        $result = array_merge($result, $this->buildInCondition('IN', [$name, $value]));
                    } else {
                        // Mongo complex condition:
                        $result[$name] = $value;
                    }
                } else {
                    // Direct match:
                    if ($name == '_id') {
                        $value = http://www.mamicode.com/$this->ensureMongoId($value);>