access_db 0.2.1

数据库连接
Documentation 
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/// 1.通过id，更新数据 ，返回 sql 语句。 
/// Update one data by id (default).
/// ```
/// let sql = myupdate!("feedback", 50, {
///     "content": "这里有",
///     "uid": 77,
/// })  // id = 50
/// 
/// 执行 do
/// myconn.run(sql);
/// 
/// // 原子更新，
/// let sql2 = myupdate!("feedback", 50, {
///     "content": ["set", "更新"],
///     "uid": ["incr", -23],
///     "des": ["unset", ""]
/// }) // 必须都带有[]
/// 
/// ```
/// 
/// 2.通过指定字段的值，更新数据 ，返回 sql 语句。
/// Update one data by filed value.
/// ```
/// let sql = myupdate!("feedback", {"uid": 12}, {"name": "zh"});
/// 
/// 执行 do
/// myconn.run(sql);
/// 
/// ```
#[macro_export]
macro_rules! myupdate {
    ($t:expr, {$ik:tt: $iv:expr}, {$($k:tt: [$m:tt, $v:expr]),+$(,)?}) => {
        {
            fn type_of<T>(_: T) -> &'static str {
                std::any::type_name::<T>()
            }
            let tmp_ik = $ik.to_string();
            let i_data = $iv.clone(); 
            let i_type = type_of($iv);
            let tmp_i = match i_type {
                "&str" => {
                    let mut v_r = i_data.to_string().as_str().replace("\\", "\\\\");
                    v_r = v_r.replace("\"", "\\\"");
                    "\"".to_string() + &v_r + "\""
                },
                "alloc::string::String" => {
                    let mut v_r = i_data.to_string().as_str().replace("\\", "\\\\");
                    v_r = v_r.replace("\"", "\\\"");
                    "\"".to_string() + &v_r + "\""
                },
                _ => {
                    i_data.to_string() + ""
                }
            };


            let mut temp_s = String::from("");
            $(
                let temp_v = $v.clone();
                let v_type = type_of($v);
                let value = match v_type {
                    "&str" => {
                        let mut v_r = temp_v.to_string().as_str().replace("\\", "\\\\");
                        v_r = v_r.replace("\"", "\\\"");
                       "\"".to_string() + &v_r + "\","
                    },
                    "alloc::string::String" => {
                        let mut v_r = temp_v.to_string().as_str().replace("\\", "\\\\");
                        v_r = v_r.replace("\"", "\\\"");
                        "\"".to_string() + &v_r + "\","
                    },
                    _ => {
                        temp_v.to_string() + ","
                    }
                };
                let tmp_s = match $m {
                    "set" => $k.to_string() + "=" + value.as_str(),
                    "incr" => {
                        let mut op = "+";
                        let first = &value.as_str()[0..1];
                        if first == "-" {
                            op = ""
                        }
                        $k.to_string() + "=" + $k + op + value.as_str()
                    },
                    "unset" => $k.to_string() + "=NULL,",
                    _ => $k.to_string() + "=" + value.as_str(),
                };
                temp_s = temp_s + tmp_s.as_str();
            )+
            
            temp_s.pop();
    
            let sql: String = "UPDATE ".to_string() + $t + " SET " + temp_s.as_str()
                + " WHERE " + tmp_ik.as_str() + "=" + tmp_i.as_str();
            
            sql
        }
    };

    ($t:expr, {$ik:tt: $iv:expr}, {$($k:tt: $v:expr),+$(,)?}) => {
        {
            fn type_of<T>(_: T) -> &'static str {
                std::any::type_name::<T>()
            }
            let tmp_ik = $ik.to_string();
            let i_data = $iv.clone(); 
            let i_type = type_of($iv);
            let tmp_i = match i_type {
                "&str" => {
                    let mut v_r = i_data.to_string().as_str().replace("\\", "\\\\");
                    v_r = v_r.replace("\"", "\\\"");
                    "\"".to_string() + &v_r + "\""
                },
                "alloc::string::String" => {
                    let mut v_r = i_data.to_string().as_str().replace("\\", "\\\\");
                    v_r = v_r.replace("\"", "\\\"");
                    "\"".to_string() + &v_r + "\""
                },
                _ => {
                    i_data.to_string() + ""
                }
            };


            let mut temp_s = String::from("");
            $(
                let temp_v = $v.clone();
                let v_type = type_of($v);
                let value = match v_type {
                    "&str" => {
                        let mut v_r = temp_v.to_string().as_str().replace("\\", "\\\\");
                        v_r = v_r.replace("\"", "\\\"");
                       "\"".to_string() + &v_r + "\","
                    },
                    "alloc::string::String" => {
                        let mut v_r = temp_v.to_string().as_str().replace("\\", "\\\\");
                        v_r = v_r.replace("\"", "\\\"");
                        "\"".to_string() + &v_r + "\","
                    },
                    _ => {
                        temp_v.to_string() + ","
                    }
                };
                let tmp_s = $k.to_string() + "=" + value.as_str();
                temp_s = temp_s + tmp_s.as_str();
            )+
            
            temp_s.pop();
    
            let sql: String = "UPDATE ".to_string() + $t + " SET " + temp_s.as_str()
                + " WHERE " + tmp_ik.as_str() + "=" + tmp_i.as_str();
            
            sql
        }
    };

    ($t:expr, $i:expr, {$($k:tt: [$m:tt, $v:expr]),+$(,)?}) => {
        {
            fn type_of<T>(_: T) -> &'static str {
                std::any::type_name::<T>()
            }
            let i_data = $i.clone(); 
            let i_type = type_of($i);
            let tmp_i = match i_type {
                "&str" => {
                    let mut v_r = i_data.to_string().as_str().replace("\\", "\\\\");
                    v_r = v_r.replace("\"", "\\\"");
                    "\"".to_string() + &v_r + "\""
                },
                "alloc::string::String" => {
                    let mut v_r = i_data.to_string().as_str().replace("\\", "\\\\");
                    v_r = v_r.replace("\"", "\\\"");
                    "\"".to_string() + &v_r + "\""
                },
                _ => {
                    i_data.to_string() + ""
                }
            };
            

            let mut temp_s = String::from("");
            $(
                let temp_v = $v.clone();
                let v_type = type_of($v);
                let value = match v_type {
                    "&str" => {
                        let mut v_r = temp_v.to_string().as_str().replace("\\", "\\\\");
                        v_r = v_r.replace("\"", "\\\"");
                       "\"".to_string() + &v_r + "\","
                    },
                    "alloc::string::String" => {
                        let mut v_r = temp_v.to_string().as_str().replace("\\", "\\\\");
                        v_r = v_r.replace("\"", "\\\"");
                        "\"".to_string() + &v_r + "\","
                    },
                    _ => {
                        temp_v.to_string() + ","
                    }
                };
                let tmp_s = match $m {
                    "set" => $k.to_string() + "=" + value.as_str(),
                    "incr" => {
                        let mut op = "+";
                        let first = &value.as_str()[0..1];
                        if first == "-" {
                            op = ""
                        }
                        $k.to_string() + "=" + $k + op + value.as_str()
                    },
                    "unset" => $k.to_string() + "=NULL,",
                    _ => $k.to_string() + "=" + value.as_str(),
                };
                temp_s = temp_s + tmp_s.as_str();
            )+
            
            temp_s.pop();
    
            let sql: String = "UPDATE ".to_string() + $t + " SET " + temp_s.as_str()
                + " WHERE id=" + tmp_i.as_str();
            
            sql
        }
    };

    ($t:expr, $i:expr, {$($k:tt: $v:expr),+$(,)?}) => {
        {
            fn type_of<T>(_: T) -> &'static str {
                std::any::type_name::<T>()
            }
            let i_data = $i.clone(); 
            let i_type = type_of($i);
            let tmp_i = match i_type {
                "&str" => {
                    let mut v_r = i_data.to_string().as_str().replace("\\", "\\\\");
                    v_r = v_r.replace("\"", "\\\"");
                    "\"".to_string() + &v_r + "\""
                },
                "alloc::string::String" => {
                    let mut v_r = i_data.to_string().as_str().replace("\\", "\\\\");
                    v_r = v_r.replace("\"", "\\\"");
                    "\"".to_string() + &v_r + "\""
                },
                _ => {
                    i_data.to_string() + ""
                }
            };


            let mut temp_s = String::from("");
            $(
                let temp_v = $v.clone();
                let v_type = type_of($v);
                let value = match v_type {
                    "&str" => {
                        let mut v_r = temp_v.to_string().as_str().replace("\\", "\\\\");
                        v_r = v_r.replace("\"", "\\\"");
                       "\"".to_string() + &v_r + "\","
                    },
                    "alloc::string::String" => {
                        let mut v_r = temp_v.to_string().as_str().replace("\\", "\\\\");
                        v_r = v_r.replace("\"", "\\\"");
                        "\"".to_string() + &v_r + "\","
                    },
                    _ => {
                        temp_v.to_string() + ","
                    }
                };
                let tmp_s = $k.to_string() + "=" + value.as_str();
                temp_s = temp_s + tmp_s.as_str();
            )+
            
            temp_s.pop();
    
            let sql: String = "UPDATE ".to_string() + $t + " SET " + temp_s.as_str()
                + " WHERE id=" + tmp_i.as_str();
            
            sql
        }
    };
}