# Code coverage report for thinkjs/lib/Lib/Extend/Model/RelationModel.js

## Statements: 100% (178 / 178) Branches: 100% (112 / 112) Functions: 100% (50 / 50) Lines: 100% (178 / 178) Ignored: none

All files » thinkjs/lib/Lib/Extend/Model/ » RelationModel.js

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     /**
     * 高级模型
     * @return {[type]} [description]
     */
    module.exports = Model(function(){

      'use strict';

      return {
        /**
         * 关联定义
         * 数据格式：
         * 'Profile': {
            type: 1, //类型
            model: 'Profile', //对应的模型名
            name: 'Profile', //获取数据后，追加到原有数据里的key
            key: 'id',
            fKey: 'user_id', //关联的key
            field: 'id,name',
            where: 'name=xx',
            order: '',
            limit: ''
         * }
         * @type {Object}
         */
        relation: {},
        /**
         * 本次使用的关联名称，默认是全部使用
         * @type {Boolean}
         */
        _relationName: true,
        /**
         * 设置本次使用的relation
         * @param {[type]} name [description]
         */
        setRelation: function(name, value){
          if (isObject(name) || !isEmpty(value)) {
            var obj = isObject(name) ? name : getObject(name, value);
            extend(this.relation, obj);
            return this;
          }
          if (isString(name)) {
            name = name.split(',');
          }
          this._relationName = name || {};
          return this;
        },
        /**
         * find后置操作
         * @param  {[type]} data [description]
         * @return {[type]}      [description]
         */
        _afterFind: function(data, options){
          return this.getRelation(data, options);
        },
        /**
         * select后置操作
         * @param  {[type]} data [description]
         * @return {[type]}      [description]
         */
        _afterSelect: function(data, options){
          return this.getRelation(data, options);
        },
        /**
         * 获取关联的数据
         * @param  {[type]}  data       [description]
         * @param  Boolean isDataList 是否是数据列表
         * @return {[type]}
         */
        getRelation: function(data, options){
          if (isEmpty(data) || isEmpty(this.relation) || isEmpty(this._relationName)) {
            return data;
          }
          var self = this;
          options = options || {};
          var promises = Object.keys(this.relation).map(function(key){
             //如果不在开启的relation内，则直接返回
            if (self._relationName !== true && self._relationName.indexOf(key) === -1) {
              return;
            }
            var item = self.relation[key];
            if (!isObject(item)) {
              item = {type: item};
            }
            var model = D(item.model || key);
            model.cache(options.cache).where(item.where).field(item.field).order(item.order).limit(item.limit);
            var opts = extend({
              name: key,
              model: model,
              type: 1,
              key: self.getPk(),
              fKey: self.name.toLowerCase() + '_id'
            }, item);
            switch(item.type){
              case 2:
                return self._getBelongsToRelation(data, opts, options);
              case 3:
                return self._getHasManyRelation(data, opts, options);
              case 4:
                return self._getManyToManyRelation(data, opts, options);
              default:
                return self._getHasOneRelation(data, opts, options);
            }
          });
          return Promise.all(promises).then(function(){
            return data;
          });
        },
        /**
         * 一对一
         * @param  {[type]} data       [description]
         * @param  {[type]} value      [description]
         * @param  {[type]} mapOptions [description]
         * @return {[type]}            [description]
         */
        _getHasOneRelation: function(data, mapOpts/*, options*/){
          var self = this;
          var where = self.parseRelationWhere(data, mapOpts);
          // if (where === false) {
          //   return {};
          // }
          return mapOpts.model.where(where).select().then(function(mapData){
            return self.parseRelationData(data, mapData, mapOpts);
          });
        },
        /**
         * 一对一，属于
         * @param  {[type]} data    [description]
         * @param  {[type]} mapOpts [description]
         * @param  {[type]} options [description]
         * @return {[type]}         [description]
         */
        _getBelongsToRelation: function(data, mapOpts/*, options*/){
          var self = this;
          return mapOpts.model.getTableFields().then(function(){
            mapOpts.key = mapOpts.model.getModelName().toLowerCase() + '_id';
            mapOpts.fKey = mapOpts.model.getPk();
            var where = self.parseRelationWhere(data, mapOpts);
            // if (where === false) {
            //   return {};
            // }
            return mapOpts.model.where(where).select().then(function(mapData){
              return self.parseRelationData(data, mapData, mapOpts);
            })
          })
        },
        /**
         * 一对多
         * @param  {[type]} data       [description]
         * @param  {[type]} value      [description]
         * @param  {[type]} mapOptions [description]
         * @return {[type]}            [description]
         */
        _getHasManyRelation: function(data, mapOpts/*, options*/){
          var self = this;
          var where = self.parseRelationWhere(data, mapOpts);
          // if (where === false) {
          //   return [];
          // }
          return mapOpts.model.where(where).select().then(function(mapData){
            return self.parseRelationData(data, mapData, mapOpts, true);
          });
        },
        /**
         * 多对多
         * @param  {[type]} data          [description]
         * @param  {[type]} value         [description]
         * @param  {[type]} mapOptions    [description]
         * @param  {[type]} parsedOptions [description]
         * @return {[type]}               [description]
         */
        _getManyToManyRelation: function(data, mapOpts, options){
          var self = this;
          return mapOpts.model.getTableFields().then(function(){
            var where = self.parseRelationWhere(data, mapOpts);
            // if (where === false) {
            //   return [];
            // }
            //关联的实体表和关系表联合查询
            var sql = 'SELECT %s, a.%s FROM %s as a, %s as b %s AND a.%s=b.%s %s';
            //获取要查询的字段
            var field = self.db.parseField(mapOpts.field).split(',').map(function(item){
              return 'b.' + item;
            }).join(',');
            var queryData = [
              field,
              mapOpts.fKey,
              mapOpts.rTable || self.getRelationTableName(mapOpts.model),
              mapOpts.model.getTableName(),
              self.db.parseWhere(where),
              mapOpts.rfKey || (mapOpts.model.getModelName().toLowerCase() + '_id'),
              mapOpts.model.getPk(),
              mapOpts.where ? (' AND ' + self.db.parseWhere(mapOpts.where).trim().slice(6)) : ''
            ];
            sql = self.parseSql(sql, queryData);
            return self.db.select(sql, options.cache).then(function(mapData){
              return self.parseRelationData(data, mapData, mapOpts, true);
            });
          });
        },
        /**
         * 多对多关系下，获取对应的关联表
         * @return {[type]} [description]
         */
        getRelationTableName: function(model){
          var table = [
            this.tablePrefix,
            this.tableName || this.name,
            '_',
            model.getModelName()
          ].join('');
          return table.toLowerCase();
        },
        /**
         * 多堆垛关系下，回去对应关联表的模型
         * @param  {[type]} model [description]
         * @return {[type]}       [description]
         */
        getRelationModel: function(model){
          var name = ucfirst(this.tableName || this.name) + ucfirst(model.getModelName());
          return D(name);
        },
        /**
         * 解析relation的where条件
         * @param  {[type]} data    [description]
         * @param  {[type]} mapKey  [description]
         * @param  {[type]} mapfKey [description]
         * @return {[type]}         [description]
         */
        parseRelationWhere: function(data, mapOpts){
          if (isArray(data)) {
            var keys = {};
            data.forEach(function(item){
              keys[item[mapOpts.key]] = 1;
            })
            var value = Object.keys(keys);
            // if (value.length === 0) {
            //   return false;
            // }
            return getObject(mapOpts.fKey, ['IN', value]);
          }
          return getObject(mapOpts.fKey, data[mapOpts.key]);
        },
        /**
         * 解析查询后的数据
         * @param  {[type]}  data     [description]
         * @param  {[type]}  mapData  [description]
         * @param  {[type]}  mapName  [description]
         * @param  {[type]}  mapKey   [description]
         * @param  {[type]}  mapfKey  [description]
         * @param  {Boolean} isArrMap [description]
         * @return {[type]}           [description]
         */
        parseRelationData: function(data, mapData, mapOpts, isArrMap){
          if (isArray(data)) {
            //提前初始化，防止mapData为空导致data里的数据没有初始化的情况
            data.forEach(function(item, i){
              data[i][mapOpts.name] = isArrMap ? [] : {};
            });
            mapData.forEach(function(mapItem){
              data.forEach(function(item, i){
                if (mapItem[mapOpts.fKey] !== item[mapOpts.key]) {
                  return;
                }
                if (isArrMap) {
                  data[i][mapOpts.name].push(mapItem);
                }else{
                  data[i][mapOpts.name] = mapItem;
                }
              });
            });
          }else{
            data[mapOpts.name] = isArrMap ? mapData : (mapData[0] || {});
          }
          return data;
        },
        /**
         * 添加后置操作
         * @param  {[type]} data          [description]
         * @param  {[type]} parsedOptions [description]
         * @return {[type]}               [description]
         */
        _afterAdd: function(data, parsedOptions){
          return this.postRelation('ADD', data, parsedOptions);
        },
        /**
         * 删除后置操作
         * @param  {[type]} data          [description]
         * @param  {[type]} parsedOptions [description]
         * @return {[type]}               [description]
         */
        _afterDelete: function(data, parsedOptions){
          return this.postRelation('DELETE', data, parsedOptions);
        },
        /**
         * 更新后置操作
         * @param  {[type]} data          [description]
         * @param  {[type]} parsedOptions [description]
         * @return {[type]}               [description]
         */
        _afterUpdate: function(data, parsedOptions){
          return this.postRelation('UPDATE', data, parsedOptions);
        },
        /**
         * 提交类关联操作
         * @param  {[type]} postType      [description]
         * @param  {[type]} data          [description]
         * @param  {[type]} parsedOptions [description]
         * @return {[type]}               [description]
         */
        postRelation: function(postType, data/*, parsedOptions*/){
          if (isEmpty(data) || isEmpty(this.relation) || isEmpty(this._relationName)) {
            return data;
          }
          var self = this;
          var promises = Object.keys(this.relation).map(function(key){
            var item = self.relation[key];
            if (!isObject(item)) {
              item = {type: item};
            }
            var opts = extend({
              type: 1,
              postType: postType,
              name: key,
              key: self.getPk(),
              fKey: self.name.toLowerCase() + '_id'
            }, item);
            //如果没有开启对应的relation，则直接返回
            if (self._relationName !== true && self._relationName.indexOf(opts.name) === -1) {
              return;
            }
            var mapData = data[opts.name];
            //如果没有对应的数据，则直接返回
            if (isEmpty(mapData) && postType !== 'DELETE' || isEmpty(data[opts.key])) {
              return;
            }
            opts.data = mapData;
            opts.model = D(item.model || key).where(item.where);
            switch(item.type){
              case 2:
                return self._postBelongsToRelation(data, opts);
              case 3:
                return self._postHasManyRelation(data, opts);
              case 4:
                return self._postManyToManyRelation(data, opts);
              default:
                return self._postHasOneRelation(data, opts);
            }
          });
          return Promise.all(promises).then(function(){
            return data;
          });
        },
        /**
         * 一对一提交
         * @param  {[type]} data          [description]
         * @param  {[type]} value         [description]
         * @param  {[type]} mapOptions    [description]
         * @param  {[type]} parsedOptions [description]
         * @return {[type]}               [description]
         */
        _postHasOneRelation: function(data, mapOpts){
          var where;
          switch(mapOpts.postType){
            case 'ADD':
              mapOpts.data[mapOpts.fKey] = data[mapOpts.key];
              return mapOpts.model.add(mapOpts.data);
            case 'DELETE':
              where = getObject(mapOpts.fKey, data[mapOpts.key]);
              return mapOpts.model.where(where).delete();
            case 'UPDATE':
              where = getObject(mapOpts.fKey, data[mapOpts.key]);
              return mapOpts.model.where(where).update(mapOpts.data);
          }
        },
        /**
         * 一对一属于
         * @param  {[type]} data [description]
         * @return {[type]}      [description]
         */
        _postBelongsToRelation: function(data){
          return data;
        },
        /**
         * 一对多提交
         * @param  {[type]} data          [description]
         * @param  {[type]} value         [description]
         * @param  {[type]} mapOptions    [description]
         * @param  {[type]} parsedOptions [description]
         * @return {[type]}               [description]
         */
        _postHasManyRelation: function(data, mapOpts){
          var mapData = mapOpts.data;
          var model = mapOpts.model;
          if (!isArray(mapData)) {
            mapData = [mapData];
          }
          switch(mapOpts.postType){
            case 'ADD':
              mapData = mapData.map(function(item){
                item[mapOpts.fKey] = data[mapOpts.key];
                return item;
              });
              return model.addAll(mapData);
            case 'UPDATE':
              return model.getTableFields().then(function(){
                var pk = model.getPk();
                var promises = mapData.map(function(item){
                  if (item[pk]) {
                    return model.update(item);
                  }else{
                    item[mapOpts.fKey] = data[mapOpts.key];
                    //添加不成功则自动忽略，不报错
                    return model.add(item).catch(function(){});
                  }
                });
                return Promise.all(promises);
              });
            case 'DELETE':
              var where = getObject(mapOpts.fKey, data[mapOpts.key]);
              return model.where(where).delete();
          }
        },
        /**
         * 多对多提交
         * @param  Object data          [description]
         * @param  object value         [description]
         * @param  {[type]} mapOptions    [description]
         * @param  {[type]} parsedOptions [description]
         * @return {[type]}               [description]
         */
        _postManyToManyRelation: function(data, mapOpts){
          var self = this;
          var model = mapOpts.model;
          var promise = model.getTableFields();
          var rfKey = mapOpts.rfKey || (model.getModelName().toLowerCase() + '_id');
          var type = mapOpts.postType;
          var mapData = mapOpts.data;
          var relationModel = self.getRelationModel(model);
          if (type === 'DELETE' || type === 'UPDATE') {
            promise = promise.then(function(){
              var where = getObject(mapOpts.fKey, data[mapOpts.key]);
              return relationModel.where(where).delete();
            });
          }
          if (type === 'ADD' || type === 'UPDATE') {
            promise = promise.then(function(){
              if (!isArray(mapData)) {
                mapData = isString(mapData) ? mapData.split(',') : [mapData];
              }
              var firstItem = mapData[0];
              //关系数据
              if (isNumberString(firstItem) || (isObject(firstItem) && (rfKey in firstItem))) {
                //生成要更新的数据
                var postData = mapData.map(function(item){
                  var key = [mapOpts.fKey, rfKey];
                  var val = [data[mapOpts.key], item[rfKey] || item];
                  return getObject(key, val);
                });
                return relationModel.addAll(postData);
              }else{ //实体数据
                var unqiueField = model.getUniqueField();
                if (!unqiueField) {
                  return getPromise(new Error('table `' + model.getTableName() + '` has no unqiue field'), true);
                }
                return self._getRalationAddIds(mapData, model, unqiueField).then(function(ids){
                  var postData = ids.map(function(id){
                    var key = [mapOpts.fKey, rfKey];
                    var val = [data[mapOpts.key], id];
                    return getObject(key, val);
                  });
                  return relationModel.addAll(postData);
                });
              }
            });
          }
          return promise;
        },
        /**
         * 插入数据，并获取插入的id集合
         * @param  {[type]} dataList    [description]
         * @param  {[type]} model       [description]
         * @param  {[type]} unqiueField [description]
         * @return {[type]}             [description]
         */
        _getRalationAddIds: function(dataList, model, unqiueField){
          var ids = [];
          var promises = dataList.map(function(item){
            if (!isObject(item)) {
              item = getObject(unqiueField, item);
            }
            var value = item[unqiueField];
            var where = getObject(unqiueField, value);
            return model.where(where).field(model.getPk()).find().then(function(data){
              if (isEmpty(data)) {
                return model.add(item).then(function(insertId){
                  ids.push(insertId);
                });
              }else{
                ids.push(data[model.getPk()]);
              }
            });
          });
          return Promise.all(promises).then(function(){
            return ids;
          });
        }
      };
    });