Single item in array cause error while removing

[kacperdev]

Issue type

I'm submitting a (check one):
[X] Bug report
[ ] Feature request
[ ] Regression (something that used to work, but stopped working in a newer version)
[ ] Support request
[ ] Documentation issue or request

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Current behavior

Hi, i'm currently working on some form based on json schema. My json is more complex, but I managed to reproduce that error on your site https://angular2-json-schema-form.firebaseapp.com/.
When Im trying to remove one item from array it gives me an error.
Code:
{ "schema": { "title": "Comment", "type": "object", "required": [ "comments" ], "properties": { "comments": { "type": "array", "minItems": 1, "items": { "type": "object", "properties": { "name": { "title": "Name", "type": "string" } } } } } }, "form": [ { "key": "comments", "items": [ "comments[].name" ] }, { "title": "OK", "type": "submit", "style": "btn-info" } ] }

It's based on one of your examples. The error is: TypeError: "this.getFormControlGroup(...).removeAt is not a function". I'm using Bootstrap 3.

Expected behavior

It should remove one of item from array.

IMPORTANT: How can we reproduce your problem?

{ "schema": { "title": "Comment", "type": "object", "required": [ "comments" ], "properties": { "comments": { "type": "array", "minItems": 1, "items": { "type": "object", "properties": { "name": { "title": "Name", "type": "string" } } } } } }, "form": [ { "key": "comments", "items": [ "comments[].name" ] }, { "title": "OK", "type": "submit", "style": "btn-info" } ] }

Environment

OS name & version: Windows 10
Browser name & version: Firefox 61.0.1
Angular version: 5
Angular JSON Schema Form version(s): 0.7.0-alpha.1
Other relevant software or packages:

Any other relevant information

[shangzhouwan]

This will work fine:
`{
"schema": {
"title": "Comment",
"type": "object",
"required": [ "comments" ],
"properties": {
"comments": {
"type": "array",
"maxItems": 2,
"items": {
"type": "object",
"properties": {
"name": {
"title": "Name",
"type": "string"
}
},
"required": [ "name" ]
}
}
}
},
"form": [

{ "key": "comments",
  "add": "New",
  "style": { "add": "btn-success" },
  "items": [{
     "items": [{
      "key":"comments[].name"
  }
  ]
  }
  ]
},
{ "title": "OK",
  "type": "submit",
  "style": "btn-info"
}

]
}`