如何在嵌套文档中填充对模型的多个引用？

Question

我有一个大的嵌套文档，我需要填充。

var PortfolioSchema = new Schema({ 
    bonds    : { 
     percentage   : Number, 
     USA     : { 
      percentage   : Number, 
      treasury    : { 
       percentage   : Number, 
       securities   : [ { 
        percentage    : Number, 
        info     : { type: ObjectId, ref: 'security' } 
       } ] 
      }, 
      municipal   : { 
       percentage   : Number, 
       securities   : [ { 
        percentage    : Number, 
        info     : { type: ObjectId, ref: 'security' } 
       } ] 
      }, 
      corporate   : { 
       percentage   : Number, 
       securities   : [ { 
        percentage    : Number, 
        info     : { type: ObjectId, ref: 'security' } 
       } ] 
      } 
     }, 
     international  : { 
      percentage   : Number, 
      developed   : { 
       percentage   : Number, 
       securities   : [ { 
        percentage    : Number, 
        info     : { type: ObjectId, ref: 'security' } 
       } ] 
      }, 
      emergent  : { 
       percentage   : Number, 
       securities   : [ { 
        percentage    : Number, 
        info     : { type: ObjectId, ref: 'security' } 
       } ] 
      } 
     } 
    }, 
    stocks   : { 
     percentage   : Number, 
     USA     : { 
      percentage   : Number, 
      largeCaps   : { 
       percentage   : Number, 
       securities   : [ { 
        percentage    : Number, 
        info     : { type: ObjectId, ref: 'security' } 
       } ] 
      }, 
      mediumCaps   : { 
       percentage   : Number, 
       securities   : [ { 
        percentage    : Number, 
        info     : { type: ObjectId, ref: 'security' } 
       } ] 
      }, 
      smallCaps   : { 
       percentage   : Number, 
       securities   : [ { 
        percentage    : Number, 
        info     : { type: ObjectId, ref: 'security' } 
       } ] 
      } 
     }, 
     international  : { 
      percentage   : Number, 
      developed   : { 
       percentage   : Number, 
       securities   : [ { 
        percentage    : Number, 
        info     : { type: ObjectId, ref: 'security' } 
       } ] 
      }, 
      emergent  : { 
       percentage   : Number, 
       securities   : [ { 
        percentage    : Number, 
        info     : { type: ObjectId, ref: 'security' } 
       } ] 
      } 
     } 
    }, 
    _goal    : { type: ObjectId, ref: 'goal' }, 
    createdAt   : { type: Date, default: Date.now }, 
    updatedAt   : { type: Date, default: Date.now } 
}); 

如何在所有这些字段中填写security？我已经尝试了下面的代码，但它不起作用。

Portfolio 
    .findById(req.params.portfolio_id) 
    .populate("security") 
    .exec(function (err, portfolio) { 
     if (err) { 
      return res.status(404).json("Portfolio not found."); 
     } 
     res.render('portfolios/show.ejs', { 
      portfolio: portfolio 
     }); 
    }); 

Answer 1

我想通了......我所要做的就是填充这些引用的字段的每一个：

Portfolio 
    .findById(req.params.portfolio_id) 
    .populate("bonds.USA.treasury.securities.info") 
    .populate("bonds.USA.municipal.securities.info") 
    .populate("bonds.USA.corporate.securities.info") 
    .populate("bonds.international.developed.securities.info") 
    .populate("bonds.international.emergent.securities.info") 
    .populate("stocks.USA.largeCaps.securities.info") 
    .populate("stocks.USA.mediumCaps.securities.info") 
    .populate("stocks.USA.smallCaps.securities.info") 
    .populate("stocks.international.developed.securities.info") 
    .populate("stocks.international.emergent.securities.info") 
    .exec(function (err, portfolio) { 
     if (err) { 
      return res.status(404).json("Portfolio not found."); 
     } 
     res.render('portfolios/show.ejs', { 
      portfolio: portfolio 
     }); 
    });