Add more methods to map column/property names

lib/sql.js

@@ -22,7 +22,11 @@ BaseSQL.prototype.queryOne = function (sql, callback) {
 };
 
 BaseSQL.prototype.dataSource = function(model) {
-    return this._models[model].model.schema;
+    var m = this._models[model];
+    if(!m) {
+        console.log(new Error('Model not found: ' + model).stack);
+    }
+    return m.model.schema;
 }
 
 BaseSQL.prototype.table = function (model) {
@@ -43,12 +47,27 @@ BaseSQL.prototype.column = function (model, property) {
     return name;
 };
 
+BaseSQL.prototype.propertyName = function (model, column) {
+    var props = this._models[model].properties;
+    for(var p in props) {
+        if(this.column(model, p) === column) {
+            return p;
+        }
+    }
+    return null;
+};
+
 BaseSQL.prototype.idName = function (model) {
     return this.dataSource(model).idName(model);
 };
 
 BaseSQL.prototype.idColumn = function (model) {
-    return this.dataSource(model).idColumnName(model);
+    var name = this.dataSource(model).idColumnName(model);;
+    var dbName = this.dbName;
+    if(typeof dbName === 'function') {
+        name = dbName(name);
+    }
+    return name;
 };
 
 BaseSQL.prototype.idColumnEscaped = function (model) {
@@ -56,7 +75,11 @@ BaseSQL.prototype.idColumnEscaped = function (model) {
 };
 
 BaseSQL.prototype.id = function (model, prop) {
-    return this._models[model].properties[prop].id;
+    var p = this._models[model].properties[prop];
+    if(!p) {
+        console.log(new Error('Property not found: ' + model +'.' + prop).stack);
+    }
+    return p.id;
 };
 
 BaseSQL.prototype.escapeName = function (name) {