Class: Tina4::ORM

Inherits:
Object
  • Object
show all
Includes:
FieldTypes
Defined in:
lib/tina4/orm.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods included from FieldTypes

included

Constructor Details

#initialize(attributes = {}) ⇒ ORM

Returns a new instance of ORM.



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# File 'lib/tina4/orm.rb', line 428

def initialize(attributes = {})
  @persisted = false
  @errors = []
  @relationship_cache = {}
  attributes.each do |key, value|
    setter = "#{key}="
    __send__(setter, value) if respond_to?(setter)
  end
  # Set defaults.
  # v3.13.11 (issue #50.1): when the default is a Proc/lambda
  # (``default: -> { Time.now }``), call it per-instance so
  # per-row timestamps actually differ. Class objects are
  # excluded — ``default: Integer`` is almost never intended
  # to mean ``Integer.new`` (and Integer has no zero-arg
  # constructor anyway).
  self.class.field_definitions.each do |name, opts|
    if __send__(name).nil? && opts[:default]
      d = opts[:default]
      d = d.call if d.respond_to?(:call) && !d.is_a?(Class)
      __send__("#{name}=", d)
    end
  end
end

Class Method Details

.all(limit: nil, offset: nil, order_by: nil, include: nil) ⇒ Object 



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# File 'lib/tina4/orm.rb', line 248

def all(limit: nil, offset: nil, order_by: nil, include: nil)
  sql = "SELECT * FROM #{table_name}"
  if soft_delete
    sql += " WHERE #{soft_delete_field} IS NULL OR #{soft_delete_field} = 0"
  end
  sql += " ORDER BY #{order_by}" if order_by
  results = db.fetch(sql, [], limit: limit, offset: offset)
  instances = results.map { |row| from_hash(row) }
  eager_load(instances, include) if include
  instances
end

.auto_crud ⇒ Object

auto_crud flag — when set to true, the class registers itself with Tina4::AutoCrud which auto-generates REST endpoints from the model. Defaults to false. Cross-framework parity with Python’s autoCrud.



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# File 'lib/tina4/orm.rb', line 69

def auto_crud
  defined?(@auto_crud) && !@auto_crud.nil? ? @auto_crud : false
end

.auto_crud=(val) ⇒ Object 



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# File 'lib/tina4/orm.rb', line 73

def auto_crud=(val)
  @auto_crud = val
  if val && defined?(::Tina4::AutoCrud)
    ::Tina4::AutoCrud.models << self unless ::Tina4::AutoCrud.models.include?(self)
  end
end

.auto_map ⇒ Object

Auto-map flag — defaults to TRUE for cross-framework parity (Python’s ORM has auto_map=True by default). The instance variable is treated as “unset” when nil; only an explicit ‘false` disables it.



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# File 'lib/tina4/orm.rb', line 58

def auto_map
  defined?(@auto_map) && !@auto_map.nil? ? @auto_map : true
end

.auto_map=(val) ⇒ Object 



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# File 'lib/tina4/orm.rb', line 62

def auto_map=(val)
  @auto_map = val
end

.belongs_to(name, class_name: nil, foreign_key: nil) ⇒ Object

belongs_to :user, class_name: “User”, foreign_key: “user_id”



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# File 'lib/tina4/orm.rb', line 112

def belongs_to(name, class_name: nil, foreign_key: nil)
  relationship_definitions[name] = {
    type: :belongs_to,
    class_name: class_name || name.to_s.split("_").map(&:capitalize).join,
    foreign_key: foreign_key || "#{name}_id"
  }

  define_method(name) do
    load_belongs_to(name)
  end
end

.clear_rel_cache ⇒ Object

Clear the relationship cache on all loaded instances (class-level helper). Useful after bulk operations when you want to force relationship re-loads.



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# File 'lib/tina4/orm.rb', line 391

def clear_rel_cache # -> nil
  @_rel_cache = {}
  nil
end

.count(conditions = nil, params = []) ⇒ Object 



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# File 'lib/tina4/orm.rb', line 272

def count(conditions = nil, params = [])
  sql = "SELECT COUNT(*) as cnt FROM #{table_name}"
  where_parts = []
  if soft_delete
    where_parts << "(#{soft_delete_field} IS NULL OR #{soft_delete_field} = 0)"
  end
  where_parts << "(#{conditions})" if conditions
  sql += " WHERE #{where_parts.join(' AND ')}" unless where_parts.empty?
  result = db.fetch_one(sql, params)
  result[:cnt].to_i
end

.create(attributes = {}) ⇒ Object 



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# File 'lib/tina4/orm.rb', line 284

def create(attributes = {})
  instance = new(attributes)
  instance.save
  instance
end

.create_table ⇒ Object 



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# File 'lib/tina4/orm.rb', line 302

def create_table
  return true if db.table_exists?(table_name)

  # v3.13.11 (BooleanField parity): pick each engine's native
  # bool type where it's reliable. SQLite has no native bool;
  # Firebird's driver round-trip for native BOOLEAN is uneven —
  # both stay on INTEGER. PG/MySQL/MSSQL use their native types
  # so Python ``True``/Ruby ``true`` bind cleanly without
  # ``operator does not exist: boolean = integer`` errors.
  engine = (db.respond_to?(:get_database_type) ? db.get_database_type : "").to_s.downcase
  bool_sql = case engine
             when "postgres", "postgresql" then "BOOLEAN"
             when "mysql" then "BOOLEAN" # alias for TINYINT(1)
             when "mssql", "sqlserver" then "BIT"
             else "INTEGER" # sqlite, firebird, odbc, anything else
             end

  type_map = {
    integer: "INTEGER",
    string: "VARCHAR(255)",
    text: "TEXT",
    float: "REAL",
    decimal: "REAL",
    boolean: bool_sql,
    date: "DATE",
    datetime: "DATETIME",
    timestamp: "TIMESTAMP",
    blob: "BLOB",
    json: "TEXT"
  }

  col_defs = []
  field_definitions.each do |name, opts|
    sql_type = type_map[opts[:type]] || "TEXT"
    if opts[:type] == :string && opts[:length]
      sql_type = "VARCHAR(#{opts[:length]})"
    end

    parts = ["#{name} #{sql_type}"]
    parts << "PRIMARY KEY" if opts[:primary_key]
    parts << "AUTOINCREMENT" if opts[:auto_increment]
    parts << "NOT NULL" if !opts[:nullable] && !opts[:primary_key]
    if opts[:default] && !opts[:auto_increment]
      default_val = opts[:default].is_a?(String) ? "'#{opts[:default]}'" : opts[:default]
      parts << "DEFAULT #{default_val}"
    end
    col_defs << parts.join(" ")
  end

  sql = "CREATE TABLE IF NOT EXISTS #{table_name} (#{col_defs.join(', ')})"
  db.execute(sql)
  db.commit
  true
end

.db ⇒ Object 



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# File 'lib/tina4/orm.rb', line 20

def db
  @db || Tina4.database
end

.db=(database) ⇒ Object

Per-model database binding



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# File 'lib/tina4/orm.rb', line 25

def db=(database)
  @db = database
end

.eager_load(instances, include_list) ⇒ Object

Eager load relationships for a collection of instances (prevents N+1). include is an array of relationship names, supporting dot notation for nesting.



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# File 'lib/tina4/orm.rb', line 159

def eager_load(instances, include_list)
  return if instances.nil? || instances.empty?

  # Group includes: top-level and nested
  top_level = {}
  include_list.each do |inc|
    parts = inc.to_s.split(".", 2)
    rel_name = parts[0].to_sym
    top_level[rel_name] ||= []
    top_level[rel_name] << parts[1] if parts.length > 1
  end

  top_level.each do |rel_name, nested|
    rel = relationship_definitions[rel_name]
    next unless rel

    klass = Object.const_get(rel[:class_name])
    pk = primary_key_field || :id

    case rel[:type]
    when :has_one, :has_many
      fk = rel[:foreign_key] || "#{name.split('::').last.downcase}_id"
      pk_values = instances.map { |inst| inst.__send__(pk) }.compact.uniq
      next if pk_values.empty?

      placeholders = pk_values.map { "?" }.join(",")
      sql = "SELECT * FROM #{klass.table_name} WHERE #{fk} IN (#{placeholders})"
      results = klass.db.fetch(sql, pk_values)
      related_records = results.map { |row| klass.from_hash(row) }

      # Eager load nested
      klass.eager_load(related_records, nested) unless nested.empty?

      # Group by FK
      grouped = {}
      related_records.each do |record|
        fk_val = record.__send__(fk.to_sym) if record.respond_to?(fk.to_sym)
        (grouped[fk_val] ||= []) << record
      end

      instances.each do |inst|
        pk_val = inst.__send__(pk)
        records = grouped[pk_val] || []
        if rel[:type] == :has_one
          inst.instance_variable_get(:@relationship_cache)[rel_name] = records.first
        else
          inst.instance_variable_get(:@relationship_cache)[rel_name] = records
        end
      end

    when :belongs_to
      fk = rel[:foreign_key] || "#{rel_name}_id"
      fk_values = instances.map { |inst|
        inst.respond_to?(fk.to_sym) ? inst.__send__(fk.to_sym) : nil
      }.compact.uniq
      next if fk_values.empty?

      related_pk = klass.primary_key_field || :id
      placeholders = fk_values.map { "?" }.join(",")
      sql = "SELECT * FROM #{klass.table_name} WHERE #{related_pk} IN (#{placeholders})"
      results = klass.db.fetch(sql, fk_values)
      related_records = results.map { |row| klass.from_hash(row) }

      klass.eager_load(related_records, nested) unless nested.empty?

      lookup = {}
      related_records.each { |r| lookup[r.__send__(related_pk)] = r }

      instances.each do |inst|
        fk_val = inst.respond_to?(fk.to_sym) ? inst.__send__(fk.to_sym) : nil
        inst.instance_variable_get(:@relationship_cache)[rel_name] = lookup[fk_val]
      end
    end
  end
end

.field_mapping ⇒ Object

Field mapping: { ‘db_column’ => ‘ruby_attribute’ }



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# File 'lib/tina4/orm.rb', line 47

def field_mapping
  @field_mapping || {}
end

.field_mapping=(map) ⇒ Object 



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# File 'lib/tina4/orm.rb', line 51

def field_mapping=(map)
  @field_mapping = map
end

.find(id_or_filter = nil, filter = nil, **kwargs) ⇒ Object 



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# File 'lib/tina4/orm.rb', line 134

def find(id_or_filter = nil, filter = nil, **kwargs)
  include_list = kwargs.delete(:include)

  # find(id) — find by primary key
  # find(filter_hash) — find by criteria
  # find(name: "Alice") — keyword args as filter hash
  result = if id_or_filter.is_a?(Hash)
    find_by_filter(id_or_filter)
  elsif filter.is_a?(Hash)
    find_by_filter(filter)
  elsif !kwargs.empty?
    find_by_filter(kwargs)
  else
    find_by_id(id_or_filter)
  end

  if include_list && result
    instances = result.is_a?(Array) ? result : [result]
    eager_load(instances, include_list)
  end
  result
end

.find_by_id(id) ⇒ Object

find_by_id is PUBLIC — cross-framework parity with Python’s MyModel.find_by_id(pk_value) and PHP’s User::find($id). Spec at spec/orm_spec.rb:78 verifies public access. find_by_filter stays public for the same reason; both are part of the documented API.



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# File 'lib/tina4/orm.rb', line 380

def find_by_id(id)
  pk = primary_key_field || :id
  sql = "SELECT * FROM #{table_name} WHERE #{pk} = ?"
  if soft_delete
    sql += " AND (#{soft_delete_field} IS NULL OR #{soft_delete_field} = 0)"
  end
  select_one(sql, [id])
end

.find_or_fail(id) ⇒ Object 



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# File 'lib/tina4/orm.rb', line 290

def find_or_fail(id)
  result = find(id)
  raise "#{name} with #{primary_key_field || :id}=#{id} not found" if result.nil?
  result
end

.from_hash(hash) ⇒ Object 



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# File 'lib/tina4/orm.rb', line 363

def from_hash(hash)
  instance = new
  mapping_reverse = field_mapping.invert
  hash.each do |key, value|
    # Apply field mapping (db_col => ruby_attr)
    attr_name = mapping_reverse[key.to_s] || key
    setter = "#{attr_name}="
    instance.__send__(setter, value) if instance.respond_to?(setter)
  end
  instance.instance_variable_set(:@persisted, true)
  instance
end

.get_db ⇒ Object

Return the database connection used by this model.



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# File 'lib/tina4/orm.rb', line 397

def get_db # -> Database
  db
end

.get_db_column(property) ⇒ Object

Map a Ruby property name to its database column name using field_mapping. Returns the column name as a symbol.



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# File 'lib/tina4/orm.rb', line 403

def get_db_column(property) # -> Symbol
  col = field_mapping[property.to_s] || property
  col.to_sym
end

.has_many(name, class_name: nil, foreign_key: nil) ⇒ Object

has_many :posts, class_name: “Post”, foreign_key: “user_id”



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# File 'lib/tina4/orm.rb', line 99

def has_many(name, class_name: nil, foreign_key: nil)
  relationship_definitions[name] = {
    type: :has_many,
    class_name: class_name || name.to_s.sub(/s$/, "").split("_").map(&:capitalize).join,
    foreign_key: foreign_key
  }

  define_method(name) do
    load_has_many(name)
  end
end

.has_one(name, class_name: nil, foreign_key: nil) ⇒ Object

has_one :profile, class_name: “Profile”, foreign_key: “user_id”



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# File 'lib/tina4/orm.rb', line 86

def has_one(name, class_name: nil, foreign_key: nil)
  relationship_definitions[name] = {
    type: :has_one,
    class_name: class_name || name.to_s.split("_").map(&:capitalize).join,
    foreign_key: foreign_key
  }

  define_method(name) do
    load_has_one(name)
  end
end

.query ⇒ Tina4::QueryBuilder

Create a fluent QueryBuilder pre-configured for this model’s table and database.

Usage:

results = User.query.where("active = ?", [1]).order_by("name").get

Returns:



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# File 'lib/tina4/orm.rb', line 130

def query
  QueryBuilder.from(table_name, db: db)
end

.relationship_definitions ⇒ Object

Relationship definitions



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# File 'lib/tina4/orm.rb', line 81

def relationship_definitions
  @relationship_definitions ||= {}
end

.scope(name, filter_sql, params = []) ⇒ Object 



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# File 'lib/tina4/orm.rb', line 357

def scope(name, filter_sql, params = [])
  define_singleton_method(name) do |limit: 20, offset: 0|
    where(filter_sql, params)
  end
end

.select(sql, params = [], limit: nil, offset: nil, include: nil) ⇒ Object 



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# File 'lib/tina4/orm.rb', line 260

def select(sql, params = [], limit: nil, offset: nil, include: nil)
  results = db.fetch(sql, params, limit: limit, offset: offset)
  instances = results.map { |row| from_hash(row) }
  eager_load(instances, include) if include
  instances
end

.select_one(sql, params = [], include: nil) ⇒ Object 



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# File 'lib/tina4/orm.rb', line 267

def select_one(sql, params = [], include: nil)
  results = select(sql, params, limit: 1, include: include)
  results.first
end

.soft_delete ⇒ Object

Soft delete configuration



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# File 'lib/tina4/orm.rb', line 30

def soft_delete
  @soft_delete || false
end

.soft_delete=(val) ⇒ Object 



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# File 'lib/tina4/orm.rb', line 34

def soft_delete=(val)
  @soft_delete = val
end

.soft_delete_field ⇒ Object 



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# File 'lib/tina4/orm.rb', line 38

def soft_delete_field
  @soft_delete_field || :is_deleted
end

.soft_delete_field=(val) ⇒ Object 



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# File 'lib/tina4/orm.rb', line 42

def soft_delete_field=(val)
  @soft_delete_field = val
end

.where(conditions, params = [], include: nil) ⇒ Object 



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# File 'lib/tina4/orm.rb', line 235

def where(conditions, params = [], include: nil)
  sql = "SELECT * FROM #{table_name}"
  if soft_delete
    sql += " WHERE (#{soft_delete_field} IS NULL OR #{soft_delete_field} = 0) AND (#{conditions})"
  else
    sql += " WHERE #{conditions}"
  end
  results = db.fetch(sql, params)
  instances = results.map { |row| from_hash(row) }
  eager_load(instances, include) if include
  instances
end

.with_trashed(conditions = "1=1", params = [], limit: 20, offset: 0) ⇒ Object 



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# File 'lib/tina4/orm.rb', line 296

def with_trashed(conditions = "1=1", params = [], limit: 20, offset: 0)
  sql = "SELECT * FROM #{table_name} WHERE #{conditions}"
  results = db.fetch(sql, params, limit: limit, offset: offset)
  results.map { |row| from_hash(row) }
end

Instance Method Details

#delete ⇒ Object 



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# File 'lib/tina4/orm.rb', line 484

def delete
  pk = self.class.primary_key_field || :id
  pk_value = __send__(pk)
  return false unless pk_value

  self.class.db.transaction do |db|
    if self.class.soft_delete
      db.update(
        self.class.table_name,
        { self.class.soft_delete_field => 1 },
        { pk => pk_value }
      )
    else
      db.delete(self.class.table_name, { pk => pk_value })
    end
  end
  @persisted = false
  true
end

#errors ⇒ Object 



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# File 'lib/tina4/orm.rb', line 585

def errors
  @errors
end

#force_delete ⇒ Object 



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# File 'lib/tina4/orm.rb', line 504

def force_delete
  pk = self.class.primary_key_field || :id
  pk_value = __send__(pk)
  raise "Cannot delete: no primary key value" unless pk_value

  self.class.db.transaction do |db|
    db.delete(self.class.table_name, { pk => pk_value })
  end
  @persisted = false
  true
end

#load(arg = nil, params = nil) ⇒ Object

load — populate this instance from the database.

Three forms (parity with Python’s model.load(sql, params, include)):

user.load                                   # reload by primary key from instance
user.load(123)                              # load by primary key value
user.load("email = ?", ["a@b.c"])           # load by filter SQL + params (selectOne)

Returns true on hit, false on miss. Always clears the relationship cache.



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# File 'lib/tina4/orm.rb', line 553

def load(arg = nil, params = nil)
  @relationship_cache = {} # Clear relationship cache on reload
  pk = self.class.primary_key_field || :id

  if arg.is_a?(String)
    # Filter-SQL form: user.load("email = ?", ["a@b.c"])
    sql = "SELECT * FROM #{self.class.table_name} WHERE #{arg} LIMIT 1"
    result = self.class.db.fetch_one(sql, params || [])
  else
    # Primary-key form: user.load OR user.load(123)
    id = arg || __send__(pk)
    return false unless id
    result = self.class.db.fetch_one(
      "SELECT * FROM #{self.class.table_name} WHERE #{pk} = ?", [id]
    )
  end
  return false unless result

  mapping_reverse = self.class.field_mapping.invert
  result.each do |key, value|
    attr_name = mapping_reverse[key.to_s] || key
    setter = "#{attr_name}="
    __send__(setter, value) if respond_to?(setter)
  end
  @persisted = true
  true
end

#persisted? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/tina4/orm.rb', line 581

def persisted?
  @persisted
end

#restore ⇒ Object 



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# File 'lib/tina4/orm.rb', line 516

def restore
  raise "Model does not support soft delete" unless self.class.soft_delete

  pk = self.class.primary_key_field || :id
  pk_value = __send__(pk)
  raise "Cannot restore: no primary key value" unless pk_value

  self.class.db.transaction do |db|
    db.update(
      self.class.table_name,
      { self.class.soft_delete_field => 0 },
      { pk => pk_value }
    )
  end
  __send__("#{self.class.soft_delete_field}=", 0) if respond_to?("#{self.class.soft_delete_field}=")
  true
end

#save ⇒ Object 



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# File 'lib/tina4/orm.rb', line 452

def save
  @errors = []
  @relationship_cache = {} # Clear relationship cache on save
  validate_fields
  return false unless @errors.empty?

  data = to_db_hash(exclude_nil: true)
  pk = self.class.primary_key_field || :id
  pk_value = __send__(pk)

  self.class.db.transaction do |db|
    if @persisted && pk_value
      filter = { pk => pk_value }
      data.delete(pk)
      # Remove mapped primary key too
      mapped_pk = self.class.field_mapping[pk.to_s]
      data.delete(mapped_pk.to_sym) if mapped_pk
      db.update(self.class.table_name, data, filter)
    else
      result = db.insert(self.class.table_name, data)
      if result[:last_id] && respond_to?("#{pk}=")
        __send__("#{pk}=", result[:last_id])
      end
      @persisted = true
    end
  end
  true
rescue => e
  @errors << e.message
  false
end

#select(*fields) ⇒ Object 



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# File 'lib/tina4/orm.rb', line 653

def select(*fields)
  fields_str = fields.map(&:to_s).join(", ")
  pk = self.class.primary_key_field || :id
  pk_value = __send__(pk)
  self.class.db.fetch_one("SELECT #{fields_str} FROM #{self.class.table_name} WHERE #{pk} = ?", [pk_value])
end

#to_array ⇒ Object Also known as: to_list 



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# File 'lib/tina4/orm.rb', line 639

def to_array
  to_h.values
end

#to_h(include: nil, case: nil) ⇒ Object Also known as: to_hash, to_dict, to_object

Convert to hash using Ruby attribute names. Optionally include relationships via the include keyword. case: “camel” converts snake_case keys to camelCase (parity with Python’s to_dict(case=‘camel’)). Default keeps native snake_case.



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# File 'lib/tina4/orm.rb', line 593

def to_h(include: nil, case: nil)
  key_case = binding.local_variable_get(:case)  # :case is a reserved word
  hash = {}
  self.class.field_definitions.each_key do |name|
    hash[name] = __send__(name)
  end

  if include
    # Group includes: top-level and nested
    top_level = {}
    include.each do |inc|
      parts = inc.to_s.split(".", 2)
      rel_name = parts[0].to_sym
      top_level[rel_name] ||= []
      top_level[rel_name] << parts[1] if parts.length > 1
    end

    top_level.each do |rel_name, nested|
      next unless self.class.relationship_definitions.key?(rel_name)
      related = __send__(rel_name)
      if related.nil?
        hash[rel_name] = nil
      elsif related.is_a?(Array)
        hash[rel_name] = related.map { |r| r.to_h(include: nested.empty? ? nil : nested) }
      else
        hash[rel_name] = related.to_h(include: nested.empty? ? nil : nested)
      end
    end
  end

  if key_case == "camel" || key_case == :camel
    # snake_case → camelCase: split on _, capitalize all but the first
    hash = hash.each_with_object({}) do |(k, v), out|
      parts = k.to_s.split("_")
      camel = parts[0] + parts[1..].map(&:capitalize).join
      out[camel.to_sym] = v
    end
  end

  hash
end

#to_json(include: nil, **_args) ⇒ Object 



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# File 'lib/tina4/orm.rb', line 645

def to_json(include: nil, **_args)
  JSON.generate(to_h(include: include))
end

#to_s ⇒ Object 



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# File 'lib/tina4/orm.rb', line 649

def to_s
  "#<#{self.class.name} #{to_h}>"
end

#validate ⇒ Object 



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# File 'lib/tina4/orm.rb', line 534

def validate
  errors = []
  self.class.field_definitions.each do |name, opts|
    value = __send__(name)
    if !opts[:nullable] && value.nil? && !opts[:auto_increment] && !opts[:default]
      errors << "#{name} cannot be null"
    end
  end
  errors
end