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Brady James Garvin
database_design
Commits
f445bcbc
Commit
f445bcbc
authored
6 years ago
by
Brady James Garvin
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Completed code in class.
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diet.py
+34
-0
34 additions, 0 deletions
diet.py
diet_installer.py
+6
-2
6 additions, 2 deletions
diet_installer.py
with
40 additions
and
2 deletions
diet.py
+
34
−
0
View file @
f445bcbc
...
@@ -6,6 +6,40 @@ from sqlalchemy.orm import sessionmaker, relationship
...
@@ -6,6 +6,40 @@ from sqlalchemy.orm import sessionmaker, relationship
Persisted
=
declarative_base
()
# pylint: disable=invalid-name
Persisted
=
declarative_base
()
# pylint: disable=invalid-name
class
User
(
Persisted
):
__tablename__
=
'
users
'
user_id
=
Column
(
Integer
,
primary_key
=
True
)
name
=
Column
(
String
(
256
),
nullable
=
False
)
meals
=
relationship
(
'
Meal
'
,
uselist
=
True
,
back_populates
=
'
user
'
)
class
Meal
(
Persisted
):
__tablename__
=
'
meals
'
meal_id
=
Column
(
Integer
,
primary_key
=
True
)
user_id
=
Column
(
Integer
,
ForeignKey
(
'
users.user_id
'
,
ondelete
=
'
CASCADE
'
),
nullable
=
False
)
timestamp
=
Column
(
DateTime
,
nullable
=
False
)
user
=
relationship
(
'
User
'
,
back_populates
=
'
meals
'
)
meal_food_types
=
relationship
(
'
MealFoodType
'
,
uselist
=
True
,
back_populates
=
'
meal
'
)
food_types
=
relationship
(
'
FoodType
'
,
uselist
=
True
,
secondary
=
'
meal_food_types
'
,
back_populates
=
'
meals
'
)
class
FoodType
(
Persisted
):
__tablename__
=
'
food_types
'
food_type_id
=
Column
(
Integer
,
primary_key
=
True
)
name
=
Column
(
String
(
256
),
nullable
=
False
)
meal_food_types
=
relationship
(
'
MealFoodType
'
,
uselist
=
True
,
back_populates
=
'
food_type
'
)
meals
=
relationship
(
'
Meal
'
,
uselist
=
True
,
secondary
=
'
meal_food_types
'
,
back_populates
=
'
food_types
'
)
class
MealFoodType
(
Persisted
):
__tablename__
=
'
meal_food_types
'
meal_id
=
Column
(
Integer
,
ForeignKey
(
'
meals.meal_id
'
,
ondelete
=
'
CASCADE
'
),
primary_key
=
True
)
food_type_id
=
Column
(
Integer
,
ForeignKey
(
'
food_types.food_type_id
'
,
ondelete
=
'
CASCADE
'
),
primary_key
=
True
)
amount
=
Column
(
Integer
,
nullable
=
False
)
meal
=
relationship
(
'
Meal
'
,
back_populates
=
'
meal_food_types
'
)
food_type
=
relationship
(
'
FoodType
'
,
back_populates
=
'
meal_food_types
'
)
class
DietDatabase
(
object
):
class
DietDatabase
(
object
):
@staticmethod
@staticmethod
def
construct_mysql_url
(
authority
,
port
,
database
,
username
,
password
):
def
construct_mysql_url
(
authority
,
port
,
database
,
username
,
password
):
...
...
This diff is collapsed.
Click to expand it.
diet_installer.py
+
6
−
2
View file @
f445bcbc
...
@@ -4,17 +4,21 @@ from sqlalchemy.exc import SQLAlchemyError
...
@@ -4,17 +4,21 @@ from sqlalchemy.exc import SQLAlchemyError
from
datetime
import
datetime
from
datetime
import
datetime
from
diet
import
DietDatabase
from
diet
import
DietDatabase
,
User
,
FoodType
,
Meal
,
MealFoodType
def
add_starter_data
(
session
):
def
add_starter_data
(
session
):
pass
ada
=
User
(
name
=
'
Ada
'
)
pancakes
=
FoodType
(
name
=
'
Pancakes
'
)
meal
=
Meal
(
user
=
ada
,
meal_food_types
=
[
MealFoodType
(
food_type
=
pancakes
,
amount
=
3
)],
timestamp
=
datetime
.
now
())
session
.
add
(
meal
)
def
main
():
def
main
():
try
:
try
:
url
=
DietDatabase
.
construct_mysql_url
(
'
localhost
'
,
3306
,
'
diet
'
,
'
root
'
,
'
cse
'
)
url
=
DietDatabase
.
construct_mysql_url
(
'
localhost
'
,
3306
,
'
diet
'
,
'
root
'
,
'
cse
'
)
diner_database
=
DietDatabase
(
url
)
diner_database
=
DietDatabase
(
url
)
diner_database
.
ensure_tables_exist
()
diner_database
.
ensure_tables_exist
()
print
(
'
Tables created.
'
)
print
(
'
Tables created.
'
)
session
=
diner_database
.
create_session
()
session
=
diner_database
.
create_session
()
...
...
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