[C++][Pistache] Add missing setter for arrays (#3837)

* [C++][Pistache] Add missing setter for arrays

Fixes #3769

* [C++][Pistache] Update Petstore sample

Author: muttleyxd

modules/openapi-generator/src/main/resources/cpp-pistache-server/model-header.mustache

@@ -35,12 +35,10 @@ public:
     /// <summary>
     /// {{description}}
     /// </summary>
-    {{#isContainer}}{{{dataType}}}& {{getter}}();
-    {{/isContainer}}{{^isContainer}}{{{dataType}}} {{getter}}() const;
-    void {{setter}}({{{dataType}}} const{{^isPrimitiveType}}&{{/isPrimitiveType}} value);
-    {{/isContainer}}{{^required}}bool {{nameInCamelCase}}IsSet() const;
-    void unset{{name}}();
-    {{/required}}
+    {{{dataType}}}{{#isContainer}}&{{/isContainer}} {{getter}}(){{^isContainer}} const{{/isContainer}};
+    void {{setter}}({{{dataType}}} const{{^isPrimitiveType}}&{{/isPrimitiveType}} value);{{^required}}
+    bool {{nameInCamelCase}}IsSet() const;
+    void unset{{name}}();{{/required}}
     {{/vars}}
 
     friend void to_json(nlohmann::json& j, const {{classname}}& o);

modules/openapi-generator/src/main/resources/cpp-pistache-server/model-source.mustache

@@ -29,7 +29,7 @@ void to_json(nlohmann::json& j, const {{classname}}& o)
 {
     j = nlohmann::json();
     {{#vars}}
-    {{#required}}j["{{baseName}}"] = o.m_{{name}};{{/required}}{{^required}}if(o.{{nameInCamelCase}}IsSet())
+    {{#required}}j["{{baseName}}"] = o.m_{{name}};{{/required}}{{^required}}if(o.{{nameInCamelCase}}IsSet(){{#isContainer}} || !o.m_{{name}}.empty(){{/isContainer}})
         j["{{baseName}}"] = o.m_{{name}};{{/required}}
     {{/vars}}
 }
@@ -45,20 +45,15 @@ void from_json(const nlohmann::json& j, {{classname}}& o)
     {{/vars}}
 }
 
-{{#vars}}{{#isContainer}}{{{dataType}}}& {{classname}}::{{getter}}()
-{
-    return m_{{name}};
-}
-{{/isContainer}}{{^isContainer}}{{{dataType}}} {{classname}}::{{getter}}() const
+{{#vars}}{{{dataType}}}{{#isContainer}}&{{/isContainer}} {{classname}}::{{getter}}(){{^isContainer}} const{{/isContainer}}
 {
     return m_{{name}};
 }
 void {{classname}}::{{setter}}({{{dataType}}} const{{^isPrimitiveType}}&{{/isPrimitiveType}} value)
 {
-    m_{{name}} = value;
-    {{^required}}m_{{name}}IsSet = true;{{/required}}
+    m_{{name}} = value;{{^required}}
+    m_{{name}}IsSet = true;{{/required}}
 }
-{{/isContainer}}
 {{^required}}bool {{classname}}::{{nameInCamelCase}}IsSet() const
 {
     return m_{{name}}IsSet;

samples/server/petstore/cpp-pistache/.openapi-generator/VERSION

@@ -1 +1 @@
-4.1.0-SNAPSHOT
+4.1.2-SNAPSHOT

samples/server/petstore/cpp-pistache/model/Pet.cpp

@@ -48,7 +48,7 @@ void to_json(nlohmann::json& j, const Pet& o)
         j["category"] = o.m_Category;
     j["name"] = o.m_Name;
     j["photoUrls"] = o.m_PhotoUrls;
-    if(o.tagsIsSet())
+    if(o.tagsIsSet() || !o.m_Tags.empty())
         j["tags"] = o.m_Tags;
     if(o.statusIsSet())
         j["status"] = o.m_Status;
@@ -121,16 +121,24 @@ std::string Pet::getName() const
 void Pet::setName(std::string const& value)
 {
     m_Name = value;
-    
 }
 std::vector<std::string>& Pet::getPhotoUrls()
 {
     return m_PhotoUrls;
 }
+void Pet::setPhotoUrls(std::vector<std::string> const& value)
+{
+    m_PhotoUrls = value;
+}
 std::vector<Tag>& Pet::getTags()
 {
     return m_Tags;
 }
+void Pet::setTags(std::vector<Tag> const& value)
+{
+    m_Tags = value;
+    m_TagsIsSet = true;
+}
 bool Pet::tagsIsSet() const
 {
     return m_TagsIsSet;

samples/server/petstore/cpp-pistache/model/Pet.h

@@ -63,14 +63,16 @@ class  Pet
     /// </summary>
     std::string getName() const;
     void setName(std::string const& value);
-        /// <summary>
+    /// <summary>
     /// 
     /// </summary>
     std::vector<std::string>& getPhotoUrls();
-        /// <summary>
+    void setPhotoUrls(std::vector<std::string> const& value);
+    /// <summary>
     /// 
     /// </summary>
     std::vector<Tag>& getTags();
+    void setTags(std::vector<Tag> const& value);
     bool tagsIsSet() const;
     void unsetTags();
     /// <summary>