Creating dynamic forms in Vue using v-for

I'm currently experimenting with creating dynamic form fields using v-for and vuex. My approach involves nesting a v-for inside another v-for. The process of adding new form fields works smoothly, but I encountered an issue when attempting to delete the default first form field after adding a second one. You can see the problem in action here: https://youtu.be/a5b0KaITPTo

Below is the code snippet I am working with:

Vuex action (the payload contains indices for the v-for loops):

removeMaterialAction({ commit }, payload) {
      console.log(payload.materialIndex);
      commit("REMOVE_MATERIAL", payload);
    },

Vuex mutation:

REMOVE_MATERIAL(state, payload) {     
      state.workOrder.tasks[payload.taskIndex].materials.splice(
        payload.materialIndex,
        1
      );
      //Vue.delete(state.workOrder.tasks[taskIndex].materials, index);
    }

I have experimented with different methods like splice, Vue.delete, filter, and shift, but they all resulted in the same issue. If you have any suggestions or solutions, I would greatly appreciate your help.

Answer №1

Discovered the solution right over here:

Essentially, you need to generate a unique identifier instead of relying on the index from v-for loop. You can implement this method in your root component's "methods" section and use it as :key attribute like generateId(obj):


     generateId(elem) {
        if (elem.id) return elem.id;

        const randomKey = Math.random()
          .toString(16)
          .slice(2);

        this.$set(elem, "id", randomKey);

        return elem.id;
      }

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