Is utilizing v-model to update the Vuex store a recommended practice?

Question

Is utilizing v-model to update the Vuex store a recommended practice?

Hello there! As a newcomer to Vue, I find myself facing a dilemma that has been weighing on my mind. I'm confused about whether we should utilize the v-model directive to make changes to the Vuex store. While Vuex guidelines suggest modifying the store only through mutations, using v-model seems to offer simplicity and brevity. Can anyone provide clarity on this issue? (I have yet to find a definitive answer).

javascript vue.js vuejs2 vuex v-model

Answer 1

Answer №1

Visit this link for more information on Vuex and forms

Using Vuex in strict mode can present challenges when using v-model with state managed by Vuex.

The recommended approach is to bind the value of the <input> and trigger an action on input or change events.

Don't forget to take a look at the "Two-way Computed Property" example provided on the linked page:

<input v-model="message">

computed: {
  message: {
    get () {
      return this.$store.state.obj.message
    },
    set (value) {
      this.$store.commit('updateMessage', value)
    }
  }
}

Answer 2

Visit this link for more information on Vuex and forms

Using Vuex in strict mode can present challenges when using v-model with state managed by Vuex.

The recommended approach is to bind the value of the <input> and trigger an action on input or change events.

Don't forget to take a look at the "Two-way Computed Property" example provided on the linked page:

<input v-model="message">

computed: {
  message: {
    get () {
      return this.$store.state.obj.message
    },
    set (value) {
      this.$store.commit('updateMessage', value)
    }
  }
}

Answer 3

Answer №2

An often overlooked solution that I believe is worth considering is utilizing vuex-map-fields. The creator of this library has also penned a comprehensive guide on its benefits, which can be found here. According to the documentation on GitHub, integrating it into your project may look something like this:

Within your Vuex Store setup, you might include a snippet resembling the following:

import Vue from 'vue';
import Vuex from 'vuex';

import { getField, updateField } from 'vuex-map-fields';

Vue.use(Vuex);

export default new Vuex.Store({
  // ...
  modules: {
    fooModule: {
      namespaced: true,
      state: {
        foo: '',
      },
      getters: {
        getField,
      },
      mutations: {
        updateField,
      },
    },
  },
});

As for your component implementation, it could entail code similar to the one below:

<template>
  <div id="app">
    <input v-model="foo">
  </div>
</template>

<script>
import { mapFields } from 'vuex-map-fields';

export default {
  computed: {
    // Assume 'fooModule' as the Vuex module name.
    ...mapFields('fooModule', ['foo']),
  },
};
</script>

You can explore more usage examples and scenarios in the library's GitHub repository linked earlier in this response.

Answer 4

An often overlooked solution that I believe is worth considering is utilizing vuex-map-fields. The creator of this library has also penned a comprehensive guide on its benefits, which can be found here. According to the documentation on GitHub, integrating it into your project may look something like this:

Within your Vuex Store setup, you might include a snippet resembling the following:

import Vue from 'vue';
import Vuex from 'vuex';

import { getField, updateField } from 'vuex-map-fields';

Vue.use(Vuex);

export default new Vuex.Store({
  // ...
  modules: {
    fooModule: {
      namespaced: true,
      state: {
        foo: '',
      },
      getters: {
        getField,
      },
      mutations: {
        updateField,
      },
    },
  },
});

As for your component implementation, it could entail code similar to the one below:

<template>
  <div id="app">
    <input v-model="foo">
  </div>
</template>

<script>
import { mapFields } from 'vuex-map-fields';

export default {
  computed: {
    // Assume 'fooModule' as the Vuex module name.
    ...mapFields('fooModule', ['foo']),
  },
};
</script>

You can explore more usage examples and scenarios in the library's GitHub repository linked earlier in this response.

Answer 5

Answer №3

Another way to implement the solution is by using mutations:

<template>
  <input v-model="text">
</template>

<script>
import { mapMutations, mapState } from 'vuex';

export default {
  computed: {
    ...mapState({textFromStore: 'text'}),
    text: {
      get() {
        return this.textFromStore;
      },
      set(value) {
        this.updateText(value);
      }
    }
  },
  methods: {
    ...mapMutations('updateText')
  }
};
</script>

Answer 6

Another way to implement the solution is by using mutations:

<template>
  <input v-model="text">
</template>

<script>
import { mapMutations, mapState } from 'vuex';

export default {
  computed: {
    ...mapState({textFromStore: 'text'}),
    text: {
      get() {
        return this.textFromStore;
      },
      set(value) {
        this.updateText(value);
      }
    }
  },
  methods: {
    ...mapMutations('updateText')
  }
};
</script>

Answer 7

Answer №4

In order to tackle this issue, I implemented a solution that involved utilizing a getter to assign the value, and using @input to trigger the mutation.

<input
  type="text"
  :value="$store.getters.apartmentStreet"
  @input="value => $store.commit('apartmentValue', { handle: 'street', value })"
>

getters.js:

export default {
  apartmentStreet: state => state.apartment.street,
};

mutations.js

export default {
  apartmentValue(state, payload) {
    let oldValue = state.apartment[payload.handle];
    let newValue = payload.value;
    if (newValue !== oldValue) state.apartment[payload.handle] = payload.value;
  }
};

It's important to consider which event you want to use when implementing this method.

Answer 8

In order to tackle this issue, I implemented a solution that involved utilizing a getter to assign the value, and using @input to trigger the mutation.

<input
  type="text"
  :value="$store.getters.apartmentStreet"
  @input="value => $store.commit('apartmentValue', { handle: 'street', value })"
>

getters.js:

export default {
  apartmentStreet: state => state.apartment.street,
};

mutations.js

export default {
  apartmentValue(state, payload) {
    let oldValue = state.apartment[payload.handle];
    let newValue = payload.value;
    if (newValue !== oldValue) state.apartment[payload.handle] = payload.value;
  }
};

It's important to consider which event you want to use when implementing this method.

Answer 9

Answer №5

This is my go-to solution.

data() {
  return {
    formData: {
      username: '',
      email: '',
      bio: {
        firstName: '',
        lastName: ''
      },
      games: ['civ4', 'caesar3', 'homeworld', 'cataclysm'],
         
    }
  }
},
computed: {
  ...mapGetters({   //or mapState
    user: 'users'
  })
},
watch: {
  user(newValue) {
    this.formData.username = newValue.name;
    this.formData.email = newValue.email;
    this.formData.bio.firstName = newValue.bio.firstName;
    this.formData.bio.lastName = newValue.bio.lastName;
    this.formData.games = newValue.games.map(x=> { return x });
  }
},
beforeCreate: fucntion() {
  this.$store.dispatch('getUser');
}

I find that using v-model regularly simplifies the process. It's crucial to create a deep copy of objects from the store, especially when dealing with arrays and nested objects like I did here.

Additionally, ensure that you initialize the user object in the store with empty fields.

Answer 10

This is my go-to solution.

data() {
  return {
    formData: {
      username: '',
      email: '',
      bio: {
        firstName: '',
        lastName: ''
      },
      games: ['civ4', 'caesar3', 'homeworld', 'cataclysm'],
         
    }
  }
},
computed: {
  ...mapGetters({   //or mapState
    user: 'users'
  })
},
watch: {
  user(newValue) {
    this.formData.username = newValue.name;
    this.formData.email = newValue.email;
    this.formData.bio.firstName = newValue.bio.firstName;
    this.formData.bio.lastName = newValue.bio.lastName;
    this.formData.games = newValue.games.map(x=> { return x });
  }
},
beforeCreate: fucntion() {
  this.$store.dispatch('getUser');
}

I find that using v-model regularly simplifies the process. It's crucial to create a deep copy of objects from the store, especially when dealing with arrays and nested objects like I did here.

Additionally, ensure that you initialize the user object in the store with empty fields.

Answer 11

Answer №6

Implementing getter and setter functions in computed properties has proven to be very effective for me. However, I encountered a scenario where I needed a 'Reset' button to revert all unsaved changes. To achieve this, I utilized a watcher in conjunction with mapState:

  <h5>Edit User</h5>
  ...
  <q-input v-model="user_data.full_name" label="Full Name" />
  <q-input v-model="user_data.email" type="email" label="Email" />
  <q-checkbox v-model="user_data.is_active" label="Is Active" />
  ...
  <q-btn label="Cancel" @click="cancel" />
  <q-btn label="Reset" @click="reset" />
  <q-btn label="Save" @click="save" />
</template>
<script>
import { mapActions, mapState } from "vuex";
export default {
  data() {
    return {
      id: "",
      user_data: {},
    };
  },
  computed: {
    ...mapState(["user"]),
  },
  watch: {
    user(value) {
      this.user_data = { ...value }; // make sure to copy object
    },
  },
  mounted() {
    this.id = parseInt(this.$route.params.id);
    this.getUserById({ id: this.id });
  },
  methods: {
    ...mapActions(["saveUser", "getUserById"]),
    save() {
      this.saveUser(this.user_data);
      this.$router.push({ name: "userList" });
    },
    reset() {
      this.user_data = this.user;
    },
    cancel() {
      this.reset();
      this.$router.push({ name: "userList" });
    },
  },
};
</script>

Answer 12

Implementing getter and setter functions in computed properties has proven to be very effective for me. However, I encountered a scenario where I needed a 'Reset' button to revert all unsaved changes. To achieve this, I utilized a watcher in conjunction with mapState:

  <h5>Edit User</h5>
  ...
  <q-input v-model="user_data.full_name" label="Full Name" />
  <q-input v-model="user_data.email" type="email" label="Email" />
  <q-checkbox v-model="user_data.is_active" label="Is Active" />
  ...
  <q-btn label="Cancel" @click="cancel" />
  <q-btn label="Reset" @click="reset" />
  <q-btn label="Save" @click="save" />
</template>
<script>
import { mapActions, mapState } from "vuex";
export default {
  data() {
    return {
      id: "",
      user_data: {},
    };
  },
  computed: {
    ...mapState(["user"]),
  },
  watch: {
    user(value) {
      this.user_data = { ...value }; // make sure to copy object
    },
  },
  mounted() {
    this.id = parseInt(this.$route.params.id);
    this.getUserById({ id: this.id });
  },
  methods: {
    ...mapActions(["saveUser", "getUserById"]),
    save() {
      this.saveUser(this.user_data);
      this.$router.push({ name: "userList" });
    },
    reset() {
      this.user_data = this.user;
    },
    cancel() {
      this.reset();
      this.$router.push({ name: "userList" });
    },
  },
};
</script>

Answer 13

Answer №7

A common practice is to update the state only within mutations for better control.

Although it's possible to directly update the state if needed, it's not recommended.

If you must, you can achieve this using:

v-model="$store.state.yourProperty"

Answer 14

A common practice is to update the state only within mutations for better control.

Although it's possible to directly update the state if needed, it's not recommended.

If you must, you can achieve this using:

v-model="$store.state.yourProperty"

Is utilizing v-model to update the Vuex store a recommended practice?

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

Answer №6

Answer №7

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