Pagy VS RVM

Now, let's dive into the pagination part of this post: setting up Pagy for handling pagination in our Rails application. If you haven't included the Pagy gem in your project, you'll need to add it manually. Here's how you can do it:

Several gems are available for pagination in Rails, but the Pagy gem is one of the most popular and efficient. It is a fast and lightweight library that provides a simple and flexible API. In this article, we’ll explore how to use it to implement pagination in Rails.

> Am I understanding correctly that there’s a significant difference in performance between using a ViewComponent + a partial vs. a ViewComponent which renders html via a tag - from inside the component?

I don't think there will be much difference at all in everyday use, but some libraries that value performance don't avoid templates for that reason, Pagy for example.

https://github.com/ddnexus/pagy

Personally I omit them in my projects whenever we want to customise attributes, I hate seeing stuff like this in templates:

    
Some header

The next step was about backporting the templates, adding Pagy gem for handling pagination and creating the controller. I was then able to show the listings with the models, but the filtering was not working.

On the backend, we'll need a few tools. Apart from the classics (ActiveRecord scopes and the pg_search gem), you’ll see how the (yet officially unreleased but production-tested) all_futures gem, built by SR authors, will act as an ideal ephemeral object to temporarily store our filter params and host our search logic. Finally, we’ll use pagy for pagination duties.

Pagination

In our application, we will use Pagy to implement pagination. Let’s install Pagy now, following along with the Pagy quick start guide.

For pagination I tend not to use gems like pagy or kaminari, instead implement this functionality just using limit and offset.

Kaminari hooks onto ActiveRecord associations and makes it super easy to page them. Pagy is another option that seems to have a solid API but I haven't tried it yet.

But how is this implemented? Well, if you use pagination in your index methods with gems like pagy, kaminari or will_paginate you will find that the same idea is happening here, they are using the power of SQL's LIMIT and OFFSET to fetch only a portion of the data each time. So in the 1 million users example, find_each will perform 1000 thousand queries with a limit of 1000 while changing the offset properly so we don't miss any record.

After googling it seems this is what I can find on GitHub issues which appears to be the most recent thread on the issue, or a similar issue.

rvm (probably the most used manager)

One suggestion would be to setup your install based on a development environment using git and a Ruby version manager like rvm or rbenv to allows you to setup a user controlled gemset and execution path.

If you're using rvm, then the rvm repository.

2023-04-30 03:17:03.814Z: #20 55.72 #20 55.72 WARNING: apt does not have a stable CLI interface. Use with caution in scripts. #20 55.72 #20 55.84 #20 55.84 Warning: PATH set to RVM ruby but GEM_HOME and/or GEM_PATH not set, see: #20 55.84 https://github.com/rvm/rvm/issues/3212 #20 55.84 2023-04-30 03:17:05.920Z: #20 57.89 ./install.sh: 32: Syntax error: "(" unexpected #20 57.89 ERROR: Feature "Android SDK" (ghcr.io/jarrodcolburn/features/android-sdk) failed to install! 2023-04-30 03:17:06.624Z: #20 ERROR: executor failed running [/bin/sh -c cp -ar /tmp/build-features-src/android-sdk_5 /tmp/dev-container-features && chmod -R 0755 /tmp/dev-container-features/android-sdk_5 && cd /tmp/dev-container-features/android-sdk_5 && chmod +x ./devcontainer-features-install.sh && ./devcontainer-features-install.sh && rm -rf /tmp/dev-container-features/android-sdk_5]: exit code: 2 2023-04-30 03:17:06.630Z: ------ > [dev_containers_target_stage 8/9] RUN --mount=type=bind,from=dev_containers_feature_content_source,source=android-sdk_5,target=/tmp/build-features-src/android-sdk_5 cp -ar /tmp/build-features-src/android-sdk_5 /tmp/dev-container-features && chmod -R 0755 /tmp/dev-container-features/android-sdk_5 && cd /tmp/dev-container-features/android-sdk_5 && chmod +x ./devcontainer-features-install.sh && ./devcontainer-features-install.sh && rm -rf /tmp/dev-container-features/android-sdk_5: #20 55.60 done. #20 55.72 #20 55.72 WARNING: apt does not have a stable CLI interface. Use with caution in scripts. #20 55.72 #20 55.84 #20 55.84 Warning: PATH set to RVM ruby but GEM_HOME and/or GEM_PATH not set, see: #20 55.84 https://github.com/rvm/rvm/issues/3212 #20 55.84 #20 57.89 ./install.sh: 32: Syntax error: "(" unexpected #20 57.89 ERROR: Feature "Android SDK" (ghcr.io/jarrodcolburn/features/android-sdk) failed to install! ------ 2023-04-30 03:17:06.633Z: ERROR: failed to solve: executor failed running [/bin/sh -c cp -ar /tmp/build-features-src/android-sdk_5 /tmp/dev-container-features && chmod -R 0755 /tmp/dev-container-features/android-sdk_5 && cd /tmp/dev-container-features/android-sdk_5 && chmod +x ./devcontainer-features-install.sh && ./devcontainer-features-install.sh && rm -rf /tmp/dev-container-features/android-sdk_5]: exit code: 2 2023-04-30 03:17:06.659Z: Stop: Run: docker buildx build --load --build-context dev_containers_feature_content_source=/tmp/devcontainercli-root/container-features/0.37.0-1682824276795 --build-arg _DEV_CONTAINERS_BASE_IMAGE=mcr.microsoft.com/devcontainers/universal:2 --build-arg _DEV_CONTAINERS_IMAGE_USER=root --build-arg _DEV_CONTAINERS_FEATURE_CONTENT_SOURCE=dev_container_feature_content_temp --target dev_containers_target_stage -t vsc-egnore-7f7c330024417fc1c88d19e7d01b832cf3eafa6230f5d96d870e989a2113e130-features -f /tmp/devcontainercli-root/container-features/0.37.0-1682824276795/Dockerfile.extended /var/lib/docker/codespacemount/.persistedshare/empty-folder 2023-04-30 03:17:06.664Z: {"outcome":"error","message":"Command failed: docker buildx build --load --build-context dev_containers_feature_content_source=/tmp/devcontainercli-root/container-features/0.37.0-1682824276795 --build-arg _DEV_CONTAINERS_BASE_IMAGE=mcr.microsoft.com/devcontainers/universal:2 --build-arg _DEV_CONTAINERS_IMAGE_USER=root --build-arg _DEV_CONTAINERS_FEATURE_CONTENT_SOURCE=dev_container_feature_content_temp --target dev_containers_target_stage -t vsc-egnore-7f7c330024417fc1c88d19e7d01b832cf3eafa6230f5d96d870e989a2113e130-features -f /tmp/devcontainercli-root/container-features/0.37.0-1682824276795/Dockerfile.extended /var/lib/docker/codespacemount/.persistedshare/empty-folder","description":"An error occurred setting up the container."} 2023-04-30 03:17:06.671Z: Error: Command failed: docker buildx build --load --build-context dev_containers_feature_content_source=/tmp/devcontainercli-root/container-features/0.37.0-1682824276795 --build-arg _DEV_CONTAINERS_BASE_IMAGE=mcr.microsoft.com/devcontainers/universal:2 --build-arg _DEV_CONTAINERS_IMAGE_USER=root --build-arg _DEV_CONTAINERS_FEATURE_CONTENT_SOURCE=dev_container_feature_content_temp --target dev_containers_target_stage -t vsc-egnore-7f7c330024417fc1c88d19e7d01b832cf3eafa6230f5d96d870e989a2113e130-features -f /tmp/devcontainercli-root/container-features/0.37.0-1682824276795/Dockerfile.extended /var/lib/docker/codespacemount/.persistedshare/empty-folder 2023-04-30 03:17:06.675Z: at wse (/usr/lib/node_modules/@devcontainers/cli/dist/spec-node/devContainersSpecCLI.js:1916:3264) 2023-04-30 03:17:06.677Z: at K7 (/usr/lib/node_modules/@devcontainers/cli/dist/spec-node/devContainersSpecCLI.js:1916:3200) 2023-04-30 03:17:06.679Z: at processTicksAndRejections (internal/process/task_queues.js:95:5) 2023-04-30 03:17:06.680Z: at async Hse (/usr/lib/node_modules/@devcontainers/cli/dist/spec-node/devContainersSpecCLI.js:1931:2626) 2023-04-30 03:17:06.695Z: at async Ch (/usr/lib/node_modules/@devcontainers/cli/dist/spec-node/devContainersSpecCLI.js:1931:3741) 2023-04-30 03:17:06.706Z: at async cae (/usr/lib/node_modules/@devcontainers/cli/dist/spec-node/devContainersSpecCLI.js:2059:17376) 2023-04-30 03:17:06.715Z: at async uae (/usr/lib/node_modules/@devcontainers/cli/dist/spec-node/devContainersSpecCLI.js:2059:17117) 2023-04-30 03:17:06.717Z: devcontainer process exited with exit code 1 ====================================== ERROR ==================================== 2023-04-30 03:17:06.724Z: Failed to create container. ================================================================================= 2023-04-30 03:17:06.726Z: Error: Command failed: docker buildx build --load --build-context dev_containers_feature_content_source=/tmp/devcontainercli-root/container-features/0.37.0-1682824276795 --build-arg _DEV_CONTAINERS_BASE_IMAGE=mcr.microsoft.com/devcontainers/universal:2 --build-arg _DEV_CONTAINERS_IMAGE_USER=root --build-arg _DEV_CONTAINERS_FEATURE_CONTENT_SOURCE=dev_container_feature_content_temp --target dev_containers_target_stage -t vsc-egnore-7f7c330024417fc1c88d19e7d01b832cf3eafa6230f5d96d870e989a2113e130-features -f /tmp/devcontainercli-root/container-features/0.37.0-1682824276795/Dockerfile.extended /var/lib/docker/codespacemount/.persistedshare/empty-folder 2023-04-30 03:17:06.729Z: Error Code: 1302 ====================================== ERROR ==================================== 2023-04-30 03:17:06.731Z: Container creation failed. ================================================================================= 2023-04-30 03:17:06.741Z: ===================================== WARNING =================================== 2023-04-30 03:17:06.758Z: Creating recovery container. =================================================================================

For my local machine, I use RVM (head). Other options are rbenv and asdf.

You can use tools like rbenv(https://github.com/rbenv/rbenv) and rvm(https://rvm.io/) to be able install and easily switch between different ruby versions

[!] There was an error parsing \Gemfile`: No such file or directory @ rbsysopen - /Users/transformhub/Desktop/rnapp/.ruby-version. Bundler cannot continue. # from /Users/transformhub/Desktop/rnapp/Gemfile:4 # ------------------------------------------- # # You may use http://rbenv.org/ or https://rvm.io/ to install and use this version > ruby File.read(File.join(dir_, '.ruby-version')).strip # # -------------------------------------------`

It depends how you install it. If you install it globally then it will work for all your projects. Are you using rvm for ruby version and gemset management? https://rvm.io/