Designing a new blog/CMS
Map the core content schema before you code. Align product, engineering, and editorial on how authors, posts, and categories connect.
AI Chart Template
Blog Posts–Authors–Categories ERD: Design a clean content schema fast
This ERD visualizes authors writing posts and posts tagged with categories, including a many-to-many relationship.
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Blog Posts–Authors–Categories ERD: Design a clean content schema fast
This ERD visualizes authors writing posts and posts tagged with categories, including a many-to-many relationship.
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What This Template Offers
A ready-to-use ER diagram that models a standard blog: Authors create Posts, Posts belong to multiple Categories—clear, editable, and share-ready.
- Best-practice entities: Authors, Posts, Categories
- Accurate cardinalities: 1-to-many and many-to-many
- Keys and constraints noted (PK, FK, UK)
- Simple to edit: add fields, rename, or extend
- Instant sharing, download, and embed options
Use cases
Perfect Use Cases
Migrating from WordPress or a legacy CMS
Document your current relationships, then adjust the ERD to fit your new stack—reduce downtime and data mismatches.
Onboarding engineers and stakeholders
Give teams a single source of truth. The visual ER diagram clarifies ownership, constraints, and scaling implications.
Teaching relational modeling
Use a familiar blog example to explain PK/FK, unique constraints, and many-to-many relationships with a junction table.
Customize
How to Customize
Add or refine attributes
Extend entities with fields like slug, published_at, status, and excerpt. Mark unique constraints (e.g., slug UK).
Detail relationships
Keep Authors → Posts as 1-to-many. For Posts ↔ Categories, use many-to-many; optionally add a PostCategories junction with (post_id FK, category_id FK).
Style and export
Adjust layout, colors, and labels for clarity. Preview instantly, then download, share a link, or embed in docs and wikis.
Key Benefits
- Proven blog schema that’s easy to extend
- Reduces modeling mistakes and rework
- Accelerates delivery with clear documentation
- Aligns tech and content teams instantly
Pro Tips
- Implement many-to-many with a junction table (PostCategories) in your physical schema for performance and clarity.
- Index foreign keys (author_id, post_id, category_id) and unique fields (email, slug) to speed queries.
- Keep categories normalized and controlled via UK on category_name to avoid duplicates.
Start now
Create Your Own erd in minutes
Turn your content model into a clear, professional ER diagram you can share—fast.
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