From 758d09659e707907d2199511569b14811dd141a0 Mon Sep 17 00:00:00 2001
From: Oleg <oleg@khabarov.ca>
Date: Mon, 15 Jul 2019 12:44:26 -0400
Subject: [PATCH] ability to set errors. closes #19

---
 lib/comfy_bootstrap_form/bootstrap_options.rb |  7 ++++
 lib/comfy_bootstrap_form/form_builder.rb      | 36 +++++++++++--------
 .../fields_with_errors_test.rb                | 24 +++++++++++++
 3 files changed, 53 insertions(+), 14 deletions(-)

diff --git a/lib/comfy_bootstrap_form/bootstrap_options.rb b/lib/comfy_bootstrap_form/bootstrap_options.rb
index 8cf6e2a..78b510e 100644
--- a/lib/comfy_bootstrap_form/bootstrap_options.rb
+++ b/lib/comfy_bootstrap_form/bootstrap_options.rb
@@ -69,6 +69,12 @@ class BootstrapOptions
     #
     attr_accessor :custom_control
 
+    # Manually rendering the error message. Example:
+    #
+    #   form.text_field :foo, bootstrap: {error: "Error Message"}
+    #
+    attr_accessor :error
+
     def initialize(options = {})
       set_defaults
       set_options(options)
@@ -124,6 +130,7 @@ def set_defaults
       @append               = nil
       @prepend              = nil
       @help                 = nil
+      @error                = nil
       @check_inline         = false
       @custom_control       = false
     end
diff --git a/lib/comfy_bootstrap_form/form_builder.rb b/lib/comfy_bootstrap_form/form_builder.rb
index 160a086..8626a7b 100644
--- a/lib/comfy_bootstrap_form/form_builder.rb
+++ b/lib/comfy_bootstrap_form/form_builder.rb
@@ -76,6 +76,7 @@ def number_field(method, options = {})
       bootstrap = form_bootstrap.scoped(options.delete(:bootstrap))
       options.reverse_merge!(step: "any")
       return super(method, options) if bootstrap.disabled
+
       draw_form_group(bootstrap, method, options) do
         super(method, options)
       end
@@ -130,8 +131,8 @@ def check_box(method, options = {}, checked_value = "1", unchecked_value = "0")
       bootstrap = form_bootstrap.scoped(options.delete(:bootstrap))
       return super if bootstrap.disabled
 
-      help_text = draw_help(bootstrap.help)
-      errors    = draw_errors(method)
+      help_text = draw_help(bootstrap)
+      errors    = draw_errors(bootstrap, method)
 
       add_css_class!(options, "form-check-input")
       add_css_class!(options, "is-invalid") if errors.present?
@@ -310,7 +311,7 @@ def form_group(options = {})
     # form group wrapper for input fields
     def draw_form_group(bootstrap, method, options)
       label  = draw_label(bootstrap, method, for_attr: options[:id])
-      errors = draw_errors(method)
+      errors = draw_errors(bootstrap, method)
 
       control = draw_control(bootstrap, errors, method, options) do
         yield
@@ -326,15 +327,21 @@ def draw_form_group(bootstrap, method, options)
       end
     end
 
-    def draw_errors(method)
-      return unless object.present?
+    def draw_errors(bootstrap, method)
+      errors = []
+
+      if bootstrap.error.present?
+        errors = [bootstrap.error]
+      else
+        return if object.nil?
 
-      errors = object.errors[method]
+        errors = object.errors[method]
 
-      # If error os on association like `belongs_to :foo`, we need to render it
-      # on an input field with `:foo_id` name.
-      if errors.blank?
-        errors = object.errors[method.to_s.sub(%r{_id$}, "")]
+        # If error is on association like `belongs_to :foo`, we need to render it
+        # on an input field with `:foo_id` name.
+        if errors.blank?
+          errors = object.errors[method.to_s.sub(%r{_id$}, "")]
+        end
       end
 
       return if errors.blank?
@@ -410,7 +417,7 @@ def draw_input_group(bootstrap, errors, &block)
       prepend_html  = draw_input_group_content(bootstrap, :prepend)
       append_html   = draw_input_group_content(bootstrap, :append)
 
-      help_text = draw_help(bootstrap.help)
+      help_text = draw_help(bootstrap)
 
       # Not prepending or appending anything. Bail.
       if prepend_html.blank? && append_html.blank?
@@ -448,7 +455,8 @@ def draw_input_group_content(bootstrap, type)
     #
     #   text_field(:value, bootstrap: {help: "help text"})
     #
-    def draw_help(text)
+    def draw_help(bootstrap)
+      text = bootstrap.help
       return if text.blank?
 
       content_tag(:small, text, class: "form-text text-muted")
@@ -480,8 +488,8 @@ def draw_choices(bootstrap, type, method, collection, value_method, text_method,
           add_css_class!(html_options, "form-check-input")
         end
 
-        errors    = draw_errors(method)
-        help_text = draw_help(bootstrap.help)
+        errors    = draw_errors(bootstrap, method)
+        help_text = draw_help(bootstrap)
 
         add_css_class!(html_options, "is-invalid") if errors.present?
 
diff --git a/test/comfy_bootstrap_form/fields_with_errors_test.rb b/test/comfy_bootstrap_form/fields_with_errors_test.rb
index 1096e02..20f2e48 100644
--- a/test/comfy_bootstrap_form/fields_with_errors_test.rb
+++ b/test/comfy_bootstrap_form/fields_with_errors_test.rb
@@ -123,4 +123,28 @@ def test_text_field_with_input_group_error
     assert_xml_equal expected, actual
   end
 
+  def test_text_field_with_manual_error
+    actual = @builder.text_field(:color, bootstrap: { error: "Custom Error" })
+    expected = <<-HTML
+      <div class="form-group">
+        <label for="user_color">Color</label>
+        <input class="form-control is-invalid" id="user_color" name="user[color]" type="text"/>
+        <div class="invalid-feedback">Custom Error</div>
+      </div>
+    HTML
+    assert_xml_equal expected, actual
+  end
+
+  def test_text_field_with_manual_error_overriding
+    actual = @builder.text_field(:test, bootstrap: { error: "Custom Error" })
+    expected = <<-HTML
+      <div class="form-group">
+        <label for="user_test">Test</label>
+        <input class="form-control is-invalid" id="user_test" name="user[test]" type="text"/>
+        <div class="invalid-feedback">Custom Error</div>
+      </div>
+    HTML
+    assert_xml_equal expected, actual
+  end
+
 end