(leanCloudUtil.js)对云数据库leancloud的简单封装，依赖callHttpService

对leancloud云数据库的restful api进行简单的封装，使其使用更接近传统后台数据库调用方式

/**
 * created by zn-Cabigail on  2017/10/10 下午4:23
 */
import service from './callHttpservice';


var baseUrl = 'https://leancloud.cn:443/1.1/'; //设置baseUrl


var getSql = function (tableName,queryParam) //转leanCloud的类sql
{

    var getOrderBy = function(value)
    {
        if(!value) return "";
        if(!value.by) return "";
        if(!value.order) return "";
        return " order by " +value.by + " " + value.order;
    };

    var query = "";
    var select = "*";
    var limit = "";
    if(!queryParam) queryParam = {};
    if(queryParam.wheresql && queryParam.wheresql.length > 0) query += " where "+queryParam.wheresql;
    if(queryParam.orderby  ) query += getOrderBy(queryParam.orderby);
    if(queryParam.keys && queryParam.keys.length > 0) select = queryParam.keys;
    if(queryParam.startindex != undefined && queryParam.pagesize != undefined)  limit  += "limit "+ queryParam.startindex + "," + queryParam.pagesize;
    console.log("[sql]  :  select " + select + " from " + tableName + query + " "+limit);
    return ("select " + select + " from " + tableName + query + " "+limit);
}


const fun = {
        //小工具，可以格式化时间字符串或者date对象，由于时间的搜索是UTC格式的时间戳，所以需要转换一下方可使用，
        //兼容字符串格式的时间(YYYY-MM-DD, YYYY-MM-DD HH:mm:ss)和Date对象(new Date());
        //使用在wheresql中
        dateFormart : function(date)
        {
        if(typeof date == 'string') return "date("+JSON.stringify(new Date(date))+")";
        if(typeof date == 'object') return "date("+JSON.stringify(date)+")";
        return date;
        },
        insert :function(tableName,body)  //添加数据，参数为表名，添加的数据body,json格式
        {
            return service.post(baseUrl+"classes/"+tableName,body);
        },
        modify : function (tableName,id,body) //修改，参数为表名，数据id，修改的数据body，json格式
        {
            return service.put(baseUrl+"classes/"+tableName+"/"+id,body);
        },
        delete :function (tableName,id) //删除，表名，数据id
        {
            return service.delete(baseUrl+"classes/"+tableName+"/"+id);
        },
        getOne:function (tableName,id) //获取一条数据，参数为id
        {
            return service.get(baseUrl+"classes/"+tableName+"/"+id);
        },
        getList:function (tableName,queryParam) //获取多条数据，参数为表名，查询参数
        {
            return service.get(baseUrl+"cloudQuery"+"?cql="+getSql(tableName,queryParam));
        },
        count:function(tableName,queryParam) //查询个数
        {
            if(!queryParam) queryParam = {};
            queryParam.orderby = {order:'desc',by:'updatedAt'};
            queryParam.keys = "count(*)";
            return service.get(baseUrl+"cloudQuery"+"?cql="+getSql(tableName,queryParam));
        },
        getPage:function (tableName,queryParam,startindex,pagesize)  //分页获取多条数据，参数为表名，查询参数，开始下表，每页展示数据条数
        {
            if(!queryParam) queryParam = {};
            queryParam.orderby = {order:'desc',by:'updatedAt'};
            queryParam.startindex =startindex;
            queryParam.pagesize =pagesize;
            return service.get(baseUrl+"cloudQuery"+"?cql="+getSql(tableName,queryParam));
        }
};

export default fun;


//-------------------------------------------------------------------------------------------------------
//查询参数格式
// var queryParam  = {
// wheresql:'createdAt > ' + util.dateFormart('2017-10-02T07:26:08.199Z')
// keys:'name,age'
// }

//wheresql基本形式
var demoWhereSql = function()
    {
        //=
        var sql1 =  "name = 'zn'";
        var sql2 =  "age = 1";
        var date =  "date = "+ fun.dateFormart('2017-01-01'); //时间的查询要用dateFormart转换
        //!=
        var sql4 = " name != 'aa'";
        //>,>=,<,<=
        var sql5 = " age > 20";
        //or
        var sql6 = " age >20 or age < 10";
        //and
        var sql7 = "age >10 and age < 20";
        //(not) like
        var sql8 = " name like '%25n'"; //左包,注意%需要encode,直接写%25就可以
        var sql9 = " name like 'z%25'"; //右包,注意%需要encode,直接写%25就可以
        var sql10 = " name like '%25zn%25'"; //全包,注意%需要encode,直接写%25就可以
        //(not) regex
        var sql11 = " name (not) regexp 'zn*'";
        //key (不)存在
        var sql12 = " weigth is (not) exists";
    }


    //调用方法
    //util.get().then(function(res){});



//查询数据，body缺省
// util.getList('zn').then(function(res){
//     if(!res) return;
//     console.log(JSON.stringify(res))
// })

// util.getOne('zn','59dc863b570c35088ceca988').then(function(res)
// {
//     if(!res) return;
//     console.log(JSON.stringify(res))
// })

// var queryParam  = {
//     wheresql:'createdAt > ' + util.dateFormart('2017-10-02T07:26:08.199Z') + " and name like '%25kk%25'",
//     orderby:{order:'asc',by:'name,age'},
//     keys:'name,age'
// }
// util.getPage('zn',queryParam,0,3).then(function(res){
//     if(!res) return;
//     console.log(JSON.stringify(res))
// })
// util.insert('zn1',{name:'wkk1',age:31}).then(function(res){
//     if(!res) return;
//     console.log(JSON.stringify(res))
// })
// util.modify('zn','59dd8901fe88c2003ca7bce5',{weight:200}).then(function(res) {
//     if(!res) return;
//     console.log(JSON.stringify(res))
// })
// util.delete('zn','59dc863b570c35088ceca988').then(function(res) {
//     if(!res) return;
//     console.log(JSON.stringify(res))

// })

// util.count('zn',queryParam).then(function(res) {
//     if(!res) return;
//     console.log(JSON.stringify(res))
// })