ThinkPHP V5.0 入门学习

<?php
namespace think;

use BadMethodCallException;
use InvalidArgumentException;
use think\db\Query;
use think\exception\ValidateException;
use think\model\Collection as ModelCollection;
use think\model\Relation;
use think\model\relation\BelongsTo;
use think\model\relation\BelongsToMany;
use think\model\relation\HasMany;
use think\model\relation\HasManyThrough;
use think\model\relation\HasOne;
use think\model\relation\MorphMany;
use think\model\relation\MorphOne;
use think\model\relation\MorphTo;

abstract class Model implements \JsonSerializable, \ArrayAccess
{
    /*...省略若干...*/
    
    /**
     * 根据关联条件查询当前模型
     * @access public
     * @param  string $relation 关联方法名
     * @param  mixed  $where    查询条件（数组或者闭包）
     * @param  mixed  $fields   字段
     * @return Relation|Query
     */
    public static function hasWhere($relation, $where = [], $fields = null)
    {
        return (new static())->$relation()->hasWhere($where, $fields);
    }
  
    /*...省略若干...*/
    
    public function __call($method, $args)
    {
        $query = $this->db(true, false);
        if (method_exists($this, 'scope' . $method)) {
            // 动态调用命名范围
            $method = 'scope' . $method;
            array_unshift($args, $query);
            call_user_func_array([$this, $method], $args);
            return $this;
        } else {
            return call_user_func_array([$query, $method], $args);
        }
    }

    public static function __callStatic($method, $args)
    {
        $model = new static();
        $query = $model->db();
        if (method_exists($model, 'scope' . $method)) {
            // 动态调用命名范围
            $method = 'scope' . $method;
            array_unshift($args, $query);

            call_user_func_array([$model, $method], $args);
            return $query;
        } else {
            return call_user_func_array([$query, $method], $args);
        }
    }
    
    /*...省略若干...*/
    
}

<?php
namespace think\db;

use PDO;
use think\App;
use think\Cache;
use think\Collection;
use think\Config;
use think\Db;
use think\db\exception\BindParamException;
use think\db\exception\DataNotFoundException;
use think\db\exception\ModelNotFoundException;
use think\Exception;
use think\exception\DbException;
use think\exception\PDOException;
use think\Loader;
use think\Model;
use think\model\Relation;
use think\model\relation\OneToOne;
use think\Paginator;

class Query
{
     /*...省略若干...*/
     
    /**
     * 指定AND查询条件
     * @access public
     * @param mixed $field     查询字段
     * @param mixed $op        查询表达式
     * @param mixed $condition 查询条件
     * @return $this
     */
    public function where($field, $op = null, $condition = null)
    {
        $param = func_get_args();
        array_shift($param);
        $this->parseWhereExp('AND', $field, $op, $condition, $param);
        return $this;
    }
    
     /*...省略若干...*/
    
    /**
     * 指定排序 order('id','desc') 或者 order(['id'=>'desc','create_time'=>'desc'])
     * @access public
     * @param string|array $field 排序字段
     * @param string       $order 排序
     * @return $this
     */
    public function order($field, $order = null)
    {
        if (empty($field)) {
            return $this;
        } elseif ($field instanceof Expression) {
            $this->options['order'][] = $field;
            return $this;
        }

        if (is_string($field)) {
            if (!empty($this->options['via'])) {
                $field = $this->options['via'] . '.' . $field;
            }
            if (strpos($field, ',')) {
                $field = array_map('trim', explode(',', $field));
            } else {
                $field = empty($order) ? $field : [$field => $order];
            }
        } elseif (!empty($this->options['via'])) {
            foreach ($field as $key => $val) {
                if (is_numeric($key)) {
                    $field[$key] = $this->options['via'] . '.' . $val;
                } else {
                    $field[$this->options['via'] . '.' . $key] = $val;
                    unset($field[$key]);
                }
            }
        }
        if (!isset($this->options['order'])) {
            $this->options['order'] = [];
        }
        if (is_array($field)) {
            $this->options['order'] = array_merge($this->options['order'], $field);
        } else {
            $this->options['order'][] = $field;
        }

        return $this;
    }
    
     /*...省略若干...*/
     
    /**
     * 设置关联查询JOIN预查询
     * @access public
     * @param string|array $with 关联方法名称
     * @return $this
     */
    public function with($with)
    {
        if (empty($with)) {
            return $this;
        }

        if (is_string($with)) {
            $with = explode(',', $with);
        }

        $first = true;

        /** @var Model $class */
        $class = $this->model;
        foreach ($with as $key => $relation) {
            $subRelation = '';
            $closure     = false;
            if ($relation instanceof \Closure) {
                // 支持闭包查询过滤关联条件
                $closure    = $relation;
                $relation   = $key;
                $with[$key] = $key;
            } elseif (is_array($relation)) {
                $subRelation = $relation;
                $relation    = $key;
            } elseif (is_string($relation) && strpos($relation, '.')) {
                $with[$key]                   = $relation;
                list($relation, $subRelation) = explode('.', $relation, 2);
            }

            /** @var Relation $model */
            $relation = Loader::parseName($relation, 1, false);
            $model    = $class->$relation();
            if ($model instanceof OneToOne && 0 == $model->getEagerlyType()) {
                $model->eagerly($this, $relation, $subRelation, $closure, $first);
                $first = false;
            } elseif ($closure) {
                $with[$key] = $closure;
            }
        }
        $this->via();
        if (isset($this->options['with'])) {
            $this->options['with'] = array_merge($this->options['with'], $with);
        } else {
            $this->options['with'] = $with;
        }
        return $this;
    }
     
     /*...省略若干...*/
    
}