fix: throw on invalid where (#15375)

BREAKING CHANGE: The `where` option will now throw if it receives an unsupported value

src/dialects/abstract/query-generator.js

@@ -1,5 +1,6 @@
 'use strict';
 
+import NodeUtil from 'node:util';
 import { getTextDataTypeForDialect } from '../../sql-string';
 import { rejectInvalidOptions, isNullish, canTreatArrayAsAnd, isColString } from '../../utils/check';
 import { TICK_CHAR } from '../../utils/dialect';
@@ -2967,7 +2968,7 @@ Only named replacements (:name) are allowed in literal() because we cannot guara
       });
     }
 
-    return '1=1';
+    throw new Error(`Unsupported where option value: ${NodeUtil.inspect(smth)}. Please refer to the Sequelize documentation to learn more about which values are accepted as part of the where option.`);
   }
 
   // A recursive parser for nested where conditions

test/unit/query-generator/get-where-conditions.test.ts

@@ -0,0 +1,16 @@
+import { expect } from 'chai';
+import { sequelize } from '../../support';
+
+describe('QueryGenerator#getWhereConditions', () => {
+  const queryGenerator = sequelize.queryInterface.queryGenerator;
+
+  it('throws if called with invalid arguments', () => {
+    const User = sequelize.define('User');
+
+    expect(() => {
+      // TODO: https://github.com/sequelize/sequelize/pull/14020 - remove expect-error
+      // @ts-expect-error
+      queryGenerator.getWhereConditions(new Date(), User.getTableName(), User);
+    }).to.throw('Unsupported where option value');
+  });
+});