Description / Steps to reproduce / Feature proposal

lb4 repository command will generate the basic repository file for a given name. It is better than copy-pasting and editing files.

Current Behavior

There is no lb4 repository command.

Expected Behavior

We should have lb4 repository command.

Acceptance Criteria

• Add lb4 repository command to @loopback/cli. Works as follows:

  • DataSource Selection (Detect in project using https://github.com/strongloop/loopback-next/blob/master/packages/cli/lib/utils.js#L210). (Infer binding key based on Boot Conventions).

  • Detect the type of Repository (DefaultCrudRepository / KVRepository) based on the DataSource (No prompt).

  • Model Selection (Detect in project using https://github.com/strongloop/loopback-next/blob/master/packages/cli/lib/utils.js#L210). This will be a multiple choice question allowing a user to select multiple models to back to same DataSource. We will generate a new class for each selected model.

  • Prompt for type of id field in Model ... if we can't infer by inspecting the Model class ourselves (Ex: Check if id property exists and set as typeof Todo.prototype.id in model or check metadata for which field is the id ... if both fail then prompt the user.

  • Use templates to generate the appropriate repository artifact as /src/repositories/<modelName>.<dataSourceName>repository.ts

• Tests + Docs
  • Ensure --config mode is supported (Can pass in answers to all prompts using JSON).
• Blog

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