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RSpec::Expectations::ExpectationNotMetError: expected X got Y RSpec: expected: 200 got: 404 (compared using ==) — RSpec::Expectations::ExpectationNotMetError

Ruby / Rails · layer 4, Application & API

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4 · Application & API 6 · Platform & cloud
RSpec::Expectations::ExpectationNotMetError: expected X got Y — RSpec: expected: 200 got: 404 (compared using ==) — RSpec::Expectations::ExpectationNotMetError (Ruby / Rails)RSpec::Expe…Bundler could not find compatible versions for gem — Bundler: Bundler could not find compatible versions for gem "activesupport": In Gemfile: rails (= 7.1.0) depends on activesupport (= 7.1.0) (Ruby / Rails)Bundler could not f…FactoryBot::DuplicateDefinitionError: Factory already registered — FactoryBot: FactoryBot::DuplicateDefinitionError: Factory already registered: user (Ruby / Rails)FactoryBot::Duplica…rake aborted! Don't know how to build task — Rake: rake aborted! Don't know how to build task 'db:migrat' (See the list of available tasks with `rake --tasks`) (Ruby / Rails)rake aborted! Don't…ArgumentError: wrong number of arguments (given 1, expected 2) — Ruby: ArgumentError: wrong number of arguments (given 1, expected 2..3) (Ruby / Rails)ArgumentError: wron…ArgumentError: missing keyword / unknown keyword — Ruby: ArgumentError: missing keyword: :name / unknown keyword: :nmae (Ruby / Rails)ArgumentError: miss…Bundler: Could not find gem in locally installed gems — Bundler: Could not find gem 'rails (~> 7.1)' in locally installed gems / Could not find rails-7.1.0 in any of the gem sources listed in your Gemfile (Ruby / Rails)Bundler: Could not …ActiveRecord::RecordInvalid: Validation failed — Rails: ActiveRecord::RecordInvalid: Validation failed: Email can't be blank, Name is too short (Ruby / Rails)ActiveRecord::Recor…held broken packages — Unmet dependencies / E: Unable to correct problems, you have held broken packages (Linux)held broken packagesTypeError: no implicit conversion of nil into String — Ruby: TypeError: no implicit conversion of nil into String (Ruby / Rails)TypeError: no impli…TypeError: nil can't be coerced into Integer — Ruby: TypeError: nil can't be coerced into Integer / String can't be coerced into Integer (Ruby / Rails)TypeError: nil can'…FrozenError: can't modify frozen String — Ruby: FrozenError: can't modify frozen String: "abc" (Ruby / Rails)FrozenError: can't …LoadError: cannot load such file — Ruby: LoadError: cannot load such file -- nokogiri (or: cannot load such file -- bundler/setup) (Ruby / Rails)LoadError: cannot l…undefined method for nil — Ruby: NoMethodError: undefined method `x' for nil (nil:NilClass) (Ruby / Rails)undefined method fo…You don't have write permissions for the /Library/Ruby/Gems directory — macOS: ERROR: While executing gem ... (Gem::FilePermissionError) You don't have write permissions for the /Library/Ruby/Gems/2.6.0 directory (macOS)You don't have writ…NameError: undefined local variable or method — Ruby: NameError: undefined local variable or method 'x' for main:Object (Ruby / Rails)NameError: undefine…Failed to build gem native extension — Ruby: ERROR: Failed to build gem native extension. current directory: /gems/pg-1.5.4/ext/pg — An error occurred while installing pg (Ruby / Rails)Failed to build gem…Nokogiri: could not find a platform gem / libxml2 build error — Bundler: Your bundle only supports platforms ["x86_64-linux"] but your local platform is arm64-darwin / Could not find gem 'nokogiri (1.16.0-arm64-darwin)' (Ruby / Rails)Nokogiri: could not…Your Ruby version is X, but your Gemfile specified Y — Bundler: Your Ruby version is 3.1.2, but your Gemfile specified 3.3.0 (Ruby / Rails)Your Ruby version i…OpenSSL::SSL::SSLError: certificate verify failed (Ruby) — Ruby: OpenSSL::SSL::SSLError: SSL_connect returned=1 errno=0 state=error: certificate verify failed (unable to get local issuer certificate) (Ruby / Rails)OpenSSL::SSL::SSLEr…ActiveRecord::RecordNotFound: Couldn't find X with 'id'= — Rails: ActiveRecord::RecordNotFound: Couldn't find User with 'id'=42 (Ruby / Rails)ActiveRecord::Recor…ActiveRecord::RecordNotUnique: duplicate key value — Rails: ActiveRecord::RecordNotUnique: PG::UniqueViolation: ERROR: duplicate key value violates unique constraint "index_users_on_email" (Ruby / Rails)ActiveRecord::Recor…ActiveRecord::ConnectionNotEstablished — Rails: ActiveRecord::ConnectionNotEstablished: No connection pool for 'ActiveRecord::Base' found (Ruby / Rails)ActiveRecord::Conne…

Directly related (7)

Bundler could not find compatible versions for gemRuby / Rails

Bundler: Bundler could not find compatible versions for gem "activesupport": In Gemfile: rails (= 7.1.0) depends on activesupport (= 7.1.0)

Two gems in your Gemfile require incompatible versions of a shared dependency.

FactoryBot::DuplicateDefinitionError: Factory already registeredRuby / Rails

FactoryBot: FactoryBot::DuplicateDefinitionError: Factory already registered: user

Two factory definitions use the same name (or files are loaded twice).

rake aborted! Don't know how to build taskRuby / Rails

Rake: rake aborted! Don't know how to build task 'db:migrat' (See the list of available tasks with `rake --tasks`)

Rake doesn't know the task name — a typo, a missing Rakefile, or a gem/engine not loaded.

ArgumentError: wrong number of arguments (given 1, expected 2)Ruby / Rails

Ruby: ArgumentError: wrong number of arguments (given 1, expected 2..3)

A method was called with more or fewer arguments than it accepts.

ArgumentError: missing keyword / unknown keywordRuby / Rails

Ruby: ArgumentError: missing keyword: :name / unknown keyword: :nmae

A method requiring keyword arguments was called without them, or with a misspelt keyword.

Bundler: Could not find gem in locally installed gemsRuby / Rails

Bundler: Could not find gem 'rails (~> 7.1)' in locally installed gems / Could not find rails-7.1.0 in any of the gem sources listed in your Gemfile

A gem from the Gemfile/Gemfile.lock isn't installed (or isn't available at that version).

ActiveRecord::RecordInvalid: Validation failedRuby / Rails

Rails: ActiveRecord::RecordInvalid: Validation failed: Email can't be blank, Name is too short

`save!`/`create!`/`update!` raised because validations failed.

Two steps away (15)

held broken packagesLinux

Unmet dependencies / E: Unable to correct problems, you have held broken packages

apt can’t find a set of package versions that satisfies all dependencies — usually mixed repositories or a package from another r…

TypeError: no implicit conversion of nil into StringRuby / Rails

Ruby: TypeError: no implicit conversion of nil into String

A String method (`+`, `File.join`, `Array#join` usage) received `nil` instead of a string.

TypeError: nil can't be coerced into IntegerRuby / Rails

Ruby: TypeError: nil can't be coerced into Integer / String can't be coerced into Integer

Arithmetic combined a number with `nil` (or a String) which Ruby can't convert automatically.

FrozenError: can't modify frozen StringRuby / Rails

Ruby: FrozenError: can't modify frozen String: "abc"

You tried to change an object that's frozen — string literals under `# frozen_string_literal: true`, constants, symbols or frozen…

LoadError: cannot load such fileRuby / Rails

Ruby: LoadError: cannot load such file -- nokogiri (or: cannot load such file -- bundler/setup)

`require` couldn't find the file/gem — it isn't installed, not in the Gemfile, or the load path is wrong.

undefined method for nilRuby / Rails

Ruby: NoMethodError: undefined method `x' for nil (nil:NilClass)

You called a method on nil — the object you expected (a record, hash value, param) wasn’t there.

You don't have write permissions for the /Library/Ruby/Gems directorymacOS

macOS: ERROR: While executing gem ... (Gem::FilePermissionError) You don't have write permissions for the /Library/Ruby/Gems/2.6.0 directory

`gem install` tries to write into Apple's system Ruby, which is protected and shouldn't be modified.

NameError: undefined local variable or methodRuby / Rails

Ruby: NameError: undefined local variable or method 'x' for main:Object

Ruby saw a bare identifier that is neither a local variable nor a method on the current object.

Failed to build gem native extensionRuby / Rails

Ruby: ERROR: Failed to build gem native extension. current directory: /gems/pg-1.5.4/ext/pg — An error occurred while installing pg

A gem with C code couldn't compile, usually because a system library or header is missing.

Nokogiri: could not find a platform gem / libxml2 build errorRuby / Rails

Bundler: Your bundle only supports platforms ["x86_64-linux"] but your local platform is arm64-darwin / Could not find gem 'nokogiri (1.16.0-arm64-darwin)'

The lockfile has no Nokogiri build for the current platform (precompiled "native" gems are per platform).

Your Ruby version is X, but your Gemfile specified YRuby / Rails

Bundler: Your Ruby version is 3.1.2, but your Gemfile specified 3.3.0

`.ruby-version`/the Gemfile `ruby` line requires a different Ruby than the one running.

OpenSSL::SSL::SSLError: certificate verify failed (Ruby)Ruby / Rails

Ruby: OpenSSL::SSL::SSLError: SSL_connect returned=1 errno=0 state=error: certificate verify failed (unable to get local issuer certificate)

Ruby's HTTP client (Net::HTTP, Faraday, gem install) couldn't verify the server's certificate.

ActiveRecord::RecordNotFound: Couldn't find X with 'id'=Ruby / Rails

Rails: ActiveRecord::RecordNotFound: Couldn't find User with 'id'=42

`find`/`find_by!` didn't find a row, so Rails raises (and renders a 404 in production).

ActiveRecord::RecordNotUnique: duplicate key valueRuby / Rails

Rails: ActiveRecord::RecordNotUnique: PG::UniqueViolation: ERROR: duplicate key value violates unique constraint "index_users_on_email"

A unique index rejected an insert/update because the value already exists.

ActiveRecord::ConnectionNotEstablishedRuby / Rails

Rails: ActiveRecord::ConnectionNotEstablished: No connection pool for 'ActiveRecord::Base' found

ActiveRecord has no database connection configured or established for this process.

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