ruby on rails - Listing all posts from a certain category -

i have posts model has category:string column on it. i'm looking display posts in categories.

e.g. on click of 'technology' category link - load posts have apple category.

couldn't find on stack overflow on this, may looking wrong thing. brilliant , appreciated!

thanks

post.where(category: 'animals')

would return posts specified category.

as comments under question - yeah, can benefit having additional model category, because post can have more, 1 category.

you define relation 1 of following:

hbtm

has_and_belongs_to_many :categories # post.rb has_and_belongs_to_many :posts # category.rb
has_many through

post.rb

has_many :categories_posts has_many :categories, through: :categories_posts

category.rb

has_many :categories_posts has_many :posts, through: :categories_posts

categories_posts.rb

belongs_to :category belongs_to :post

edit

to add selecting category(ies) form, add following (assuming category has name attributes):

<%= f.select :categories, category.pluck(:id, :name), {}, multiple: true %>

also don't forget whitelist categories in permitted params (posts_controller.rb):

def post_params   params.require(:post).permit(:attr1, :attr2, category_ids: []) end

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