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Someone help me with this error: Cannot set property 'type' of undefined. In my schema discord.js

I need help solving this problem. If I put 2, or greater than 2 in $guaranteedTier in my database, I get this error "cannot set property 'type' of undefined. But if it's 1 in $guaranteedTier, it works normally. The error is on line 112: cardToAdd.type = 'character'; Could tell me what I did wrong, and what could I do, to solve this?

My Schema:

const { model, Schema } = require('mongoose');
const Probability = require('probability-node');
const _ = require('lodash');

const cardPackSchema = new Schema({
    name: {
        type: String,
        unique: true
    },
    description: String,
    cards: Number, //Número de cartas dentro desse pack
    type: String, //Se é um Personagem, Feitiço, Item, Todos
    tier: Number,
    probability: {
        //Probabilidade de pegar cartas de especifico tier
        1: Number,
        2: Number,
        3: Number,
        4: Number,
        5: Number,
    },
    price: Number,
    discount: Number, //Desconto em porcentagem %
    stock: Number, // -1 é infinito no estoque
    guaranteedTier: Number //Se refere ao tier da descriçao do pack
});

cardPackSchema.methods.purchase = async function(memberID) {
    //->Initialization
    const profile = await this.model('Profile')
      .findOne({ memberID })
      .exec();
  
    //->Validation
    if (this.stock === 0)
      return {
        res: 'err',
        title: 'Not available',
        desc: 'The pack you are trying to purchase is out of stock'
      };
  
    if (profile.coins < this.price - this.price * this.discount)
      return {
        res: 'err',
        title: 'Insufficient Coins',
        desc: 'You do not have sufficient coins to purchase this pack'
      };
  
    //->Purchasing
    const cards = []; //Cards to give to the player;
  
    //-> Adding Guaranteed tier card
    if (this.guaranteedTier > 1) {
      addCard.call(this, this.guaranteedTier);
      this.cards--;
    }
  
    //->Probabilitized function
    const addRandomCard = new Probability(
      {
        p: this.probability['1'],
        f: () => addCard.call(this, 1)
      },
      {
        p: this.probability['2'],
        f: () => addCard.call(this, 2)
      },
      {
        p: this.probability['3'],
        f: () => addCard.call(this, 3)
      },
      {
        p: this.probability['4'],
        f: () => addCard.call(this, 4)
      },
      {
        p: this.probability['5'],
        f: () => addCard.call(this, 5)
      }
    );
  
    //-> Adding the rest of the cards
    for (var i = 1 + cards.length; i <= this.cards; i++) {
      await addRandomCard();
    }
  
    //->Add Cards to inventory
    const deck = await this.model('Deck')
      .findOne({ memberID })
      .exec();
  
    profile.deductCoins(this.price - this.price * this.discount);
  
    await deck.addCards(cards);
    //->Return card names
    return {
      res: 'success',
      cards,
      coins: profile.coins - (this.price - this.price * this.discount)
    };
  
    //->Add Card function
    async function addCard(tier) {
      const randomTypeCard = Math.floor(Math.random() * 1) + 1;
  
      //Adding a Character card
      if (
        (randomTypeCard === 1 && this.type === 'all') ||
        this.type === 'character'
      ) {
        const cardToAdd = _.sample(await model('Character').find({ tier }));
        cardToAdd.type = 'character';
        if (
          !_.includes(cards.map(card => card.name), cardToAdd.name) ||
          cardToAdd.sold >= cardToAdd.stock
        ) {
          await cardToAdd.sell();
          cards.push(cardToAdd);
        } else addCard.call(this, tier);
      }
    }


};

model('CardPack', cardPackSchema);
Via Active questions tagged javascript - Stack Overflow https://ift.tt/2FdjaAW

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