Improve Join Condition Parsing for Complex Queries

[ZaidMaslouhi]

Description

Enhance the join condition parsing mechanism to support more complex query scenarios, particularly those involving array-like values such as date ranges.

Key Changes

• Modified join condition parsing to use '&' as a delimiter
• Implemented robust handling of array values in join conditions
• Updated documentation to reflect new parsing approach
• Added comprehensive test coverage

Detailed Improvements

1. Parsing Mechanism

   • Replaced existing query string parsing approach
   • Introduced '&' symbol as a new delimiter for join conditions
   • Improved support for array values in on clauses

2. Testing

   • Added new test cases covering join conditions with array values
   • Verified parsing of complex query strings, including date range examples

3. Documentation

   • Updated documentation to explain new join condition syntax
   • Provided clear examples of using join conditions with array values

Example Usage

# New syntax for join conditions with array values
join[]=events||id,name||on[0]=event.status||$eq||active&on[1]=event.date||$between||16-12-2023,23-12-2023

Impact

• Increased flexibility in constructing complex join conditions
• Better support for range-based and multi-value filters
• More intuitive query string parsing

Related Issues

Closes gid-oss#68 (if applicable)

Type of Changes

• Bug Fix
• Query String Parsing Improvement
• Documentation Update

Testing

• Comprehensive test suite added
• Verified parsing of various join condition scenarios