sinatra body yielded non string value - sinatra

Question

I'm trying to insert a new branch for distributor data to pass to Sinatra. It's able to insert a new record but this error is produced:
"ERROR Rack::Lint::LintError: body yielded non string value [:disBranchID, 27]"
disBranchID is the primary key of the table and it's set to auto increment.
The HTML looks like this:
<form name="add_dis_branch_form" action="/add_dis_branch" method="post" id="disB" enctype="multipart/form-data">
<div class="input-group">
<span class="input-group-addon"> Brand </span>
<select id="disSlcMan" class="btn btn-default full-width" name="disID" ng-model="disB.disID" required>
<option value="">Select Brand</option>
<% AutoMobile::DB[:distributor].select(:disID, :disComName).each do |dis| %>
<option value="<%= dis[:disID]%>"><%= dis[:disComName] %></option>
<% end %>
</select>
</div>
<br>
<div class="input-group">
<span class="input-group-addon"><i class="fa fa-map-marker"></i> Address</span>
<input type="text" class="form-control" name="address" placeholder="Address" required ng-model="disB.address" >
</div>
<br>
<div class="row">
<div class="col-lg-6 col-md-6">
<div class="input-group">
<span class="input-group-addon"> City </span>
<input type="text" class="form-control" name="city" placeholder="Petaling Jaya" required ng-model="disB.city">
</div>
</div>
<div class="col-lg-6 col-md-6">
<div class="input-group">
<span class="input-group-addon"> State </span>
<input type="text" class="form-control" name="state" placeholder="Selangor" required ng-model="disB.state">
</div>
</div>
</div>
<br>
<div class="row">
<div class="col-lg-6 col-md-6">
<div class="input-group">
<span class="input-group-addon"> Zip </span>
<input type="text" class="form-control" name="zip" placeholder="47800" required ng-model="disB.zip" ng-pattern="/^\d{5}$/">
</div>
<span ng-show="add_dis_branch_form.zip.$error.pattern" class="help-inline">Invalid zip code</span>
</div>
<div class="col-lg-6 col-md-6">
<div class="input-group">
<span class="input-group-addon" title="Map"><i class="fa fa-map-marker"></i></span>
<button id="btMap" class="btn btn-success form-control" onclick="return false;">Find Your Location</button>
</div>
</div>
</div>
<br>
<div class="row">
<div class="col-lg-6 col-md-6">
<div class="input-group">
<span class="input-group-addon"> Latitude </span>
<input type="text" class="form-control" id="disLat" name="latitude" required ng-model="disB.latitude" >
</div>
</div>
<div class="col-lg-6 col-md-6">
<div class="input-group">
<span class="input-group-addon"> Longitude </span>
<input type="text" class="form-control" id="disLong" name="longitude" required ng-model="disB.longitude" >
</div>
</div>
</div>
<small>
<b class="help-inline">
Click Find Your Location button to locate your address.
</b>
</small>
<br>
<div class="row">
<div class="col-lg-6 col-md-6">
<div class="input-group">
<span class="input-group-addon"><i class="fa fa-phone"></i> Phone</span>
<input type="text" class="form-control" name="phoneNo" placeholder="03-12345432" required ng-model="disB.phoneNo" ng-pattern="/^0[0-9]{1}-[0-9]{8}$/">
</div>
</div>
<div class="col-lg-6 col-md-6">
<div class="input-group">
<span class="input-group-addon"><i class="fa fa-print"></i> Fax </span>
<input type="text" class="form-control" name="faxNo" placeholder="03-12345432" required ng-model="disB.faxNo" ng-pattern="/^0[0-9]{1}-[0-9]{8}$/">
</div>
</div>
</div>
<br>
<div class="pull-right">
<input type="submit" class="btn btn-success" ng-disabled="!canSave('add_dis_branch_form')">
</div>
</form> <!-- end form -->
The Sinatra code:
add_dis_branch = lambda do
newBranch = AutoMobile::DisBranch.new
newBranch.address = params[:address]
newBranch.city = params[:city]
newBranch.state = params[:state]
newBranch.zip = params[:zip]
newBranch.phone = params[:phoneNo]
newBranch.fax = params[:faxNo]
newBranch.latitude = params[:latitude]
newBranch.longitude = params[:longitude]
newBranch.disID = params[:disID]
newBranch.save
end

Answer 1

Here is one way you could write the route:
post "/automobile/branch" do
newBranch = AutoMobile::DisBranch.new
newBranch.address = params[:address]
newBranch.city = params[:city]
newBranch.state = params[:state]
newBranch.zip = params[:zip]
newBranch.phone = params[:phoneNo]
newBranch.fax = params[:faxNo]
newBranch.latitude = params[:latitude]
newBranch.longitude = params[:longitude]
newBranch.disID = params[:disID]
newBranch.save
halt 201
end
but I suggest you take a good read of the documentation for Sinatra on creating routes and for Sequel on creating model instances.