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Pagination and Search

Paginate the feed and search post text.

Goal

This snapshot advances Mossbank Post by teaching you to paginate the feed and search post text.

Every numbered folder is a complete app. Run this stage independently, then compare it with the previous folder.

Prerequisites

Use Go 1.22+, and Docker for Postgres stages.

Port 8083 must be free. Copy .env.example before starting database stages.

  • Go toolchain
  • A code editor and terminal
  • Docker from part 4 onward

Concepts

Page size 5. Search filters before paginating.

Keep handlers thin: templates present data, handlers enforce rules, and html/template escapes by default.

Walkthrough

Accept q and page query params.

Read the example, then open the matching snapshot. The repository includes the surrounding setup and error handling.

const pageSize = 5
offset := (page - 1) * pageSize

Run and verify

Enter 10-Pagination-And-Search, copy .env.example, and start Gin on port 8083.

Open http://127.0.0.1:8083. Watch the terminal for validation and database errors.

docker compose up -d
git clone https://github.com/michaeldunga1/fcc-gin-blog.git
cd fcc-gin-blog/10-Pagination-And-Search
cp .env.example .env
go run .

Troubleshooting

Off-by-one often comes from mixing 0-based offsets with 1-based pages.

For database failures, confirm Docker and the mossbank_NN name. Never commit .env.

  • Read the first error first
  • Restart after environment changes
  • Never commit secrets

Try this

Search for ownership and confirm matching cards.

Test a happy path and one invalid or unauthorized request.

  • Make one small change
  • Test it in the browser
  • Compare with the next snapshot only after it works

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