# [Stephen Grider] Microservices with Node JS and React [ENG, 2020]

# 17. Cross-Service Data Replication In Action

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### 01. The Orders Service

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![Application](/img/pic-17-01.png?raw=true)

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### 02. Scaffolding the Orders Service

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![Application](/img/pic-17-02.png?raw=true)

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### 03. A Touch More Setup

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### 04. Ingress Routing Rules

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![Application](/img/pic-17-03.png?raw=true)

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### 05. Scaffolding a Few Route Handlers

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### 06. Subtle Service Coupling

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### 07. Associating Orders and Tickets

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![Application](/img/pic-17-04.png?raw=true)

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![Application](/img/pic-17-05.png?raw=true)

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![Application](/img/pic-17-06.png?raw=true)

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### 08. Order Model Setup

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### 09. The Need for an Enum

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![Application](/img/pic-17-07.png?raw=true)

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### 10. Creating an Order Status Enum

    $ cd common
    $ npm run pub

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    $ cd orders
    $ npm update @grider-ms-tickets/common

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### 11. More on Mongoose Refs

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### 12. Defining the Ticket Model

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### 13. Order Creation Logic

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### 14. Finding Reserved Tickets

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### 15. Convenience Document Methods

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### 16. Order Expiration Times

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### 17. Test Suite Setup

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### 18. Asserting Tickets Exist

    $ co orders
    $ npm run test

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### 19. Asserting Reserved Tickets

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### 20. Testing the Success Case

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### 21. Fetching a User's Orders

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### 22. A Slightly Complicated Test

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### 23. Fetching Individual Orders

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### 24. Does Fetching Work

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### 25. Cancelling an Order

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### 26. Can We Cancel

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---

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**Marley**

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