Validator fails when parameter is a 1-element array

[Skeeve]

Versions

• vee-validate: 3.2.5
• vue: 2.6.11

Describe the bug
I have a custom validator requiring an array of objects as parameter. When this array has more than one element, everything works fine. Has it just one element, the validator receives just the one element, not an array with onw element.

To reproduce

This is the validator

extend("notOneOf", {
  validate(val, args) {
    return !args.existingOwners.some(function(e) {
      return (
        0 == e.owner.localeCompare(val, undefined, { sensitivity: "accent" })
      );
    });
  },
  params: ["existingOwners"],
  message: "«{_value_}» already exists."
});

The array of objects looks like this:

  data() {
    return {
      owner: "",
      owners: [
        { owner: "a", … },
        { owner: "b", … },
        …
      ]
    };
  },

And the input field:

        <validation-provider
          :rules="{ required: true, notOneOf: owners }"
          v-slot="{ errors }"
        >
          <label>
            Owner
            <input
              type="text"
              placeholder="Enter a (new) owner."
              v-model="owner"
              name="owner"
              minlength="4"
            />
            <span :class="{ alert: errors[0] }">
              {{ errors[0] }}
            </span>
          </label>
        </validation-provider>

Expected behavior
The validator works for 2 and more element array. When there is just one element I get

TypeError: args.existingOwners.some is not a function app.js line 354 > eval:45:33

Checking with console it reveals that the validator receives just the one element of the array, not an array.

Desktop (please complete the following information):

• OS: MacOS 10.14.16
• Browser FireFox
• Version 74.0.1

Additional context
"Compiling" vue in a docker container, using it in another docker container with Mojolicious.

[logaretm]

Thank you for reporting this issue, I have identified the problem and fixed it.

It should be relased in the next patch release