Metadata for entire entities including table mapping and relationships. More...

#include <entity.h>

Collaboration diagram for database::orm::entity_metadata:

Public Member Functions
	entity_metadata (const std::string &table_name)

void	add_field (const field_metadata &field)

const std::vector< field_metadata > &	fields () const

const std::string &	table_name () const

const field_metadata *	get_primary_key () const

std::vector< const field_metadata * >	get_indexes () const

std::vector< const field_metadata * >	get_foreign_keys () const

std::string	create_table_sql () const

std::string	create_indexes_sql () const

Private Attributes
std::string	table_name_

std::vector< field_metadata >	fields_

Detailed Description

Metadata for entire entities including table mapping and relationships.

Definition at line 117 of file entity.h.

Constructor & Destructor Documentation

◆ entity_metadata()

database::orm::entity_metadata::entity_metadata ( const std::string & table_name )

Examples: /home/runner/work/database_system/database_system/database/orm/entity.h.

Definition at line 82 of file entity.cpp.

        : table_name_(table_name)
    {
    }

Member Function Documentation

◆ add_field()

void database::orm::entity_metadata::add_field ( const field_metadata & field )

Examples: /home/runner/work/database_system/database_system/database/orm/entity.h.

Definition at line 87 of file entity.cpp.

    {
        fields_.push_back(field);
    }

References fields_.

Referenced by TEST_F(), TEST_F(), and TEST_F().

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◆ create_indexes_sql()

std::string database::orm::entity_metadata::create_indexes_sql ( ) const

Examples: /home/runner/work/database_system/database_system/database/orm/entity.h.

Definition at line 146 of file entity.cpp.

    {
        std::ostringstream oss;
        auto indexes = get_indexes();
 
        for (const auto* index : indexes) {
            if (!index->index_name().empty()) {
                oss << "CREATE INDEX IF NOT EXISTS " << index->index_name()
                    << " ON " << table_name_ << "(" << index->name() << ");\n";
            } else {
                oss << "CREATE INDEX IF NOT EXISTS idx_" << table_name_
                    << "_" << index->name() << " ON " << table_name_
                    << "(" << index->name() << ");\n";
            }
        }
 
        return oss.str();
    }

References get_indexes(), database::orm::index, and table_name_.

Referenced by main(), TEST_F(), and TEST_F().

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◆ create_table_sql()

std::string database::orm::entity_metadata::create_table_sql ( ) const

Examples: /home/runner/work/database_system/database_system/database/orm/entity.h.

Definition at line 123 of file entity.cpp.

    {
        std::ostringstream oss;
        oss << "CREATE TABLE IF NOT EXISTS " << table_name_ << " (\n";
 
        bool first = true;
        for (const auto& field : fields_) {
            if (!first) oss << ",\n";
            oss << "  " << field.to_sql_definition();
            first = false;
        }
 
        // Add foreign key constraints
        auto foreign_keys = get_foreign_keys();
        for (const auto* fk : foreign_keys) {
            oss << ",\n  FOREIGN KEY (" << fk->name() << ") REFERENCES "
                << fk->foreign_table() << "(" << fk->foreign_field() << ")";
        }
 
        oss << "\n)";
        return oss.str();
    }

References fields_, get_foreign_keys(), and table_name_.

Referenced by main(), and TEST_F().

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◆ fields()

const std::vector< field_metadata > & database::orm::entity_metadata::fields ( ) const

inline

Examples: /home/runner/work/database_system/database_system/database/orm/entity.h.

Definition at line 123 of file entity.h.

123{ return fields_; }

References fields_.

◆ get_foreign_keys()

std::vector< const field_metadata * > database::orm::entity_metadata::get_foreign_keys ( ) const

Examples: /home/runner/work/database_system/database_system/database/orm/entity.h.

Definition at line 112 of file entity.cpp.

    {
        std::vector<const field_metadata*> foreign_keys;
        for (const auto& field : fields_) {
            if (field.is_foreign_key()) {
                foreign_keys.push_back(&field);
            }
        }
        return foreign_keys;
    }

References fields_.

Referenced by create_table_sql().

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◆ get_indexes()

std::vector< const field_metadata * > database::orm::entity_metadata::get_indexes ( ) const

Examples: /home/runner/work/database_system/database_system/database/orm/entity.h.

Definition at line 101 of file entity.cpp.

    {
        std::vector<const field_metadata*> indexes;
        for (const auto& field : fields_) {
            if (field.has_index()) {
                indexes.push_back(&field);
            }
        }
        return indexes;
    }

References fields_.

Referenced by create_indexes_sql().

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◆ get_primary_key()

const field_metadata * database::orm::entity_metadata::get_primary_key ( ) const

Examples: /home/runner/work/database_system/database_system/database/orm/entity.h.

Definition at line 92 of file entity.cpp.

    {
        auto it = std::find_if(fields_.begin(), fields_.end(),
            [](const field_metadata& field) {
                return field.is_primary_key();
            });
        return (it != fields_.end()) ? &(*it) : nullptr;
    }