ERModel

Diagram

Data requirements

Entities

Users – Entity that defines the users of the platform.

• id – numeric type (primary key)
• username – text type (required, unique)
• password – text type (required)
• email – text type (required, unique)

Admins – Administrator profile. Inherits from Users.

• user_id – numeric type (primary key, foreign key to Users)

Suggestion – Lets users to suggest components that they want to be added.

• id – numeric type (primary key)
• user_id – numeric type (foreign key to Users)
• admin_id – numeric type (foreign key to Admins)
• link – text type (required)
• admin_comment – text type (optional)
• description – text type (optional)
• status – text type (required)
• component type – text type (required)

Component – Entity representing all hardware components.

• id – numeric type (primary key)
• name – text type (required)
• brand – text type (required)
• price – numeric type (required)
• type – text type (required)
• img_url – text type (optional)

CPU – Entity detailing CPU components. Inherits from Component.

• component_id – numeric type (primary & foreign key to Component)
• socket – text type (required)
• cores – numeric type (required)
• threads – numeric type (required)
• base_clock – numeric type (required)
• boost_clock – numeric type (optional)
• tdp – numeric type (required)

GPU – Entity for graphics cards. Inherits from Component.

• component_id – numeric type (primary & foreign key to Component)
• vram – numeric type (required)
• tdp – numeric type (required)
• base_clock – numeric type (optional)
• boost_clock – numeric type (optional)
• chipset – text type (required)
• length – numeric type (required)

Memory – RAM modules. Inherits from Component.

• component_id – numeric type (primary & foreign key to Component)
• type – text type (required)
• speed – numeric type (required)
• capacity – numeric type (required)
• modules – numeric type (required)

Power_Supply – Power supply units. Inherits from Component.

• component_id – numeric type (primary & foreign key to Component)
• type – text type (required)
• wattage – numeric type (required)
• form_factor – text type (required)

Case – Computer cases. Inherits from Component.

• component_id – numeric type (primary & foreign key to Component)
• cooler_max_height – numeric type (required)
• gpu_max_length – numeric type (required)

Case_Storage_Form_Factors – Supported storage form factors for a case.

• case_id – numeric type (primary key & foreign key to Case)
• form_factor – text type (primary key)
• num_slots – numeric type (required)

Case_PS_Form_Factors – Supported Power Supply form factors for a case.

• case_id – numeric type (primary key & foreign key to Case)
• form_factor – text type (primary key)

Case_Mobo_Form_Factors – Supported motherboard form factors for a case.

• case_id – numeric type (primary key & foreign key to Case)
• form_factor – text type (primary key)

Cooler – CPU coolers. Inherits from Component.

• component_id – numeric type (primary & foreign key to Component)
• type – text type (required)
• height – numeric type (required)
• max_tdp_supported – numeric type (required)

Cooler_CPU_Sockets – Supported CPU sockets for a cooler.

• cooler_id – numeric type (primary key & foreign key to Cooler)
• socket – text type (primary key)

Motherboard – Motherboards. Inherits from Component.

• component_id – numeric type (primary & foreign key to Component)
• socket – text type (required)
• chipset – text type (required)
• form_factor – text type (required)
• ram_type – text type (required)
• num_ram_slots – numeric type (required)
• max_ram_capacity – numeric type (required)
• pci_express_slots – numeric type (required)

Storage – Storage devices. Inherits from Component.

• component_id – numeric type (primary & foreign key to Component)
• type – text type (required)
• capacity – numeric type (required)
• form_factor – text type (required)

Memory_Card – Memory card readers. Inherits from Component.

• component_id – numeric type (primary & foreign key to Component)
• num_slots – numeric type (required)
• interface – text type (required)

Optical_Drive – CD/DVD/Blu-Ray drives. Inherits from Component.

• component_id – numeric type (primary & foreign key to Component)
• form_factor – text type (required)
• type – text type (required)
• interface – text type (required)
• write_speed – numeric type (required)
• read_speed – numeric type (required)

Sound_Card – Dedicated sound cards. Inherits from Component.

• component_id – numeric type (primary & foreign key to Component)
• sample_rate – numeric type (required)
• bit_depth – numeric type (required)
• chipset – text type (required)
• interface – text type (required)
• channel – text type (required)

Cables – Computer cables. Inherits from Component.

• component_id – numeric type (primary & foreign key to Component)
• length_cm – numeric type (required)
• type – text type (required)

Network_Adapter – Wireless network adapters. Inherits from Component.

• component_id – numeric type (primary & foreign key to Component)
• wifi_version – text type (required)
• interface – text type (required)
• num_antennas – numeric type (required)

Network_Card – Wired network cards. Inherits from Component.

• component_id – numeric type (primary & foreign key to Component)
• num_ports – numeric type (required)
• speed – numeric type (required)
• interface – text type (required)

Build – Entity for user PC configurations.

• id – numeric type (primary key)
• user_id – numeric type (foreign key to Users)
• name – text type (required)
• created_at – date type (required)
• description – text type (optional)
• total_price – numeric type (required)
• is_approved – boolean type (required)

Build_Component – Components belonging to a configuration.

• build_id – numeric type (primary key, foreign key to Build)
• component_id – numeric type (primary key, foreign key to Component)

Favorite_Build – User’s favorited configurations.

• build_id – numeric type (primary key, foreign key to Build)
• user_id – numeric type (primary key, foreign key to Users)

Rating_Build – Ratings for PC builds.

• build_id – numeric type (primary key, foreign key to Build)
• user_id – numeric type (primary key, foreign key to Users)
• value – numeric type (required)

Review – User comments on a build.

• id – numeric type (primary key)
• build_id – numeric type (foreign key to Build)
• user_id – numeric type (foreign key to Users)
• content – text type (required)
• created_at – date type (required)

Relations

• owns_build – 1:N relationship between Users and Build, linking a user to their PC configurations.
• has_component – N:M relationship between Build and Component, representing components included in a build.
• favorites – N:M relationship between Users and Build, allowing users to favorite builds.
• rates – N:M relationship between Users and Build, allowing users to give ratings (1–5).
• written_by – 1:N relationship between Users and Review, linking users to their written reviews.
• reviews – 1:N relationship between Build and Review, linking reviews to a specific build.
• submit – 1:N relationship between Users and Suggestion, allowing users to suggest components.
• moderate – 1:N relationship between Admins and Suggestion, allowing admins to approve or reject user suggestions.