[Vuejs]-How to make Vue get data from the database each time an action happens?

The modal is in your v-for…
Every time you click, you open all modal (and you see only the last one)

Make something like this:
https://codesandbox.io/s/simple-todo-app-with-vue-gx097

PS: You can have rendering issue with the v-for without :key …
https://v2.vuejs.org/v2/api/?#key