Laravel: Fill form with form :: model

I use the same form to register and edit, so I have that if else to show form . Since I have the Convenio and Endereco table, I need to get the address information through with , my question is how to fill out the form automatically with this information.

The data for the Convenio table is normally filled in, but the table with with is not. In the form :: model, if I change the $convenio to $convenio->endereco , it fills in the fields referring to this table, but does not fill in the fields of the agreement table.

Would there be any way to put the variable $convenio and $convenio->endereco together there in form ? I tried a few ways, but they did not work.

If I leave the input name as array , as endereco[rua] , it works, but the error at the time of registering.

CONTROLLER

$convenio = Convenio::with('endereco')
                        ->with('telefones')
                        ->find($id);

$cidades = Cidade::pluck('nomeCidade', 'id');

$servicos = Servico::pluck('nomeServ', 'id')->all();

$title = 'Editar convênio';

return view('painel.convenio.create-edit', compact('convenio', 'cidades', 'servicos', 'title'));

VIEW

@if(isset($convenio))
            {!! Form::model($convenio, ['route' => ['convenio.update', $convenio->id], 'method' => 'put']) !!}
        @else
            {!! Form::open(['route' => 'convenio.store']) !!}
        @endif
            <div class="row form-group">
                <div class="col-sm-12">
                    {!! Form::label('nome', 'Nome') !!}
                    {!! Form::input('text', 'nome', null, ['id' => 'nome', 'placeholder' => 'Nome do convênio', 'class' => 'form-control']) !!}
                </div>
            </div>

        <div class="row form-group">
            <div class="col-sm-6">
                {!! Form::label('cidade', 'Cidade') !!}
                {{ Form::select('id_cidade', $cidades, null, ['class' => 'form-control', 'id' => 'cidade']) }}
            </div>

            <div class="col-sm-6">
                {!! Form::label('rua', 'Rua') !!}
                {!! Form::input('text', 'rua', null, ['id' => 'rua', 'placeholder' => 'Rua', 'class' => 'form-control']) !!}
            </div>
        </div>

        <div class="row form-group">
            <div class="col-sm-6">
                {!! Form::label('numero', 'Número') !!}
                {!! Form::input('text', 'numero', null, ['id' => 'numero', 'placeholder' => 'Número', 'class' => 'form-control']) !!}
            </div>

            <div class="col-sm-6">
                {!! Form::label('sala', 'Sala') !!}
                {!! Form::input('text', 'sala', null, ['id' => 'sala', 'placeholder' => 'Sala', 'class' => 'form-control']) !!}
            </div>
        </div>

        <div class="row form-group">
            <div class="col-sm-12">
                {!! Form::label('fone', 'Telefone') !!}
            </div>

            <div class="fones">
                <div class="col-sm-3">
                    <input id="fone" type="text" name="fone[]" placeholder="Telefone" class="form-control fone">
                </div>
            </div>

            <a class="btn remover">Remover</a>
            <a class="btn adicionar">Adicionar</a>
        </div>

        <div class="row form-group">
            <div class="col-sm-6">
                {!! Form::label('servico', 'Tipo de serviço') !!}
                {!! Form::select('id_servico', [null => 'Selecione o tipo de serviço'] + $servicos, null, ['class' => 'form-control', 'id' => 'servico']) !!}
            </div>

            <div class="col-sm-6">
                {!! Form::label('especialidades', 'Tipo de especialidade') !!}
                <select name="id_especialidade" id="especialidades" class="form-control">
                    <option value="">Selecione o tipo de serviço</option>
                </select>
            </div>
        </div>

        <div class="row form-group">
            <div class="col-sm-12">
                {!! Form::label('descricao', 'Informações adicionais') !!}
                {!! Form::textarea('descricao', null, ['id' => 'descricao', 'placeholder' => 'Informações adicionais', 'class' => 'form-control']) !!}
            </div>
        </div>

        {!! Form::submit('Salvar', ['class' => 'btn btn-primary']) !!}

        <a href="{{route('convenio.index')}}" class="btn btn-primary">Voltar</a>
    {!! Form::close() !!}