fix(convention): fix camel to snake for complex names

src/convention.js

@@ -1,13 +1,16 @@
 module.exports = class Convention {
-  camelToSnake (string) {
-    return string.replace(/([A-Z])/g, '_$1').toLowerCase().replace(/^_/, '')
+  camelToSnake(string) {
+    return string
+      .replace(/^[A-Z]/, (match) => match.toLowerCase()) // Lowercase the first letter
+      .replace(/([a-z])([A-Z]+)/g, (match, p1, p2) => p1 + '_' + p2) // Add underscore between lowercase and uppercase letters
+      .toLowerCase(); // Convert the entire string to lowercase
   }
 
-  toTableFieldName (entityField) {
+  toTableFieldName(entityField) {
     return this.camelToSnake(entityField)
   }
 
-  isScalarType (type) {
+  isScalarType(type) {
     const scalarTypes = [Number, String, Boolean, Date, Object, Array]
     return scalarTypes.includes(type)
   }

test/unit/convention.test.js

@@ -12,5 +12,35 @@ describe('Convetion', () => {
         //then
         assert.deepStrictEqual(dbField, "field_name")
     })
+
+    it('entity field name (ID) to database field name', () => {
+        //given
+        const entityField = "fieldID"
+        const convention = new Convetion()
+        //when
+        const dbField = convention.toTableFieldName(entityField)
+        //then
+        assert.deepStrictEqual(dbField, "field_id")
+    })
 
+    it('entity field name (Id) to database field name', () => {
+        //given
+        const entityField = "fieldId"
+        const convention = new Convetion()
+        //when
+        const dbField = convention.toTableFieldName(entityField)
+        //then
+        assert.deepStrictEqual(dbField, "field_id")
+    })
+
+    it('entity complex field name (Id) to database field name', () => {
+        //given
+        const entityField = "ThisIsAnFieldId"
+        const convention = new Convetion()
+        //when
+        const dbField = convention.toTableFieldName(entityField)
+        //then
+        assert.deepStrictEqual(dbField, "this_is_an_field_id")
+    })
+
 })