From 16c06ed7ff96ca91bc398bacfcf029b556cd695c Mon Sep 17 00:00:00 2001 From: YUERONG HUANG Date: Tue, 16 Jul 2024 22:09:21 +1000 Subject: [PATCH] complete lab --- lib/debug.py | 5 +- lib/freebies.db | Bin 20480 -> 24576 bytes .../versions/415d27725948_create_freebies.py | 37 +++++++++ lib/models.py | 52 +++++++++++++ lib/seed.py | 73 +++++++++++++++++- 5 files changed, 165 insertions(+), 2 deletions(-) create mode 100644 lib/migrations/versions/415d27725948_create_freebies.py diff --git a/lib/debug.py b/lib/debug.py index 4f922eb69..9f85f7b32 100644 --- a/lib/debug.py +++ b/lib/debug.py @@ -1,9 +1,12 @@ #!/usr/bin/env python3 from sqlalchemy import create_engine +from sqlalchemy.orm import sessionmaker -from models import Company, Dev +from models import Company, Dev, Freebie if __name__ == '__main__': engine = create_engine('sqlite:///freebies.db') + Session = sessionmaker(bind=engine) + session = Session() import ipdb; ipdb.set_trace() diff --git a/lib/freebies.db b/lib/freebies.db index 12beb1c963e832db481e7a7493e3029e691ac4dc..7488edf19bea9dcb42f824f41b5cad3965723d36 100644 GIT binary patch literal 24576 zcmeI4O>7&-6~|{kxXWFBtYk_gU7lRgiJViN=e0YN|z5CjAPK|l}?1Ox#=;C~?S#y4Vm z?!pD>aVjJom+twLb{ravU$s)BTx^wbtGHS%VJ1xBZwQ6+< zgE^%AHY0tCcZ-eEMzO(-4~RRU1pXvVT6}A@I7`4Yt;QeB0Wpk&*g%;-*TMBl``ZIz*u?Yf#fFK|U2m*qDARq_`0)l`b zAP5Kog1|FEAT7yruUxriue|!|%C#@Q@+A}U68ircDXvIE5D)|e0YN|z5CjAPK|l}? z1Ox#=KoB@4U@3FPN&U~)|4mCm)}O53TJKnITCR21s#q^tlVB8^ARq_`0)l`bAP5Ko zf`A|(2nYg#fFSU!5J;OUx*)F(f*!6{OZvx?hKgq8+7N#8k1M`6IMhG67*|nAu6XPS zeno$@gqwXQ>|w%eyh?pWd|Us`gs!5C@+$2fEbkK5rTTl58uzp6dk@)igAQq+e>fXc zQAMtiuFe0Mz+S=|p1lwMzQH{;oqpeAf&Tsrs*1{Tv)g0Tv8lg=Yo2EhM}2l3@XSK} z_p=IjRQJM=cPNn{B#hc*)M_Amecpb-VoP_A3BU4W#bCET6F2_p!$7+Yu!EKyKp?I zE2vPmAHvrO7)1L%eE(o+3Yv@bJZ^SD?I&XjnyESg!KEHymI}>VB=j9daGea?v;yO| ze9|4_RSyO|Co5>N=5%}1bs?lt0BMQG=(sN4>G%$1sl<=aN@B@OeBb(`^=s>GQ2&oD zX6;(nt$AxA{rB`A5@GsR>9^Bwr5~r=bTj>x^jtcT`b*+o>ciA8Q$J4qAocAONo}UC zrJhUvBl$`4{X{YOPV$Gz?3f$;B0erwGc*E%)1oK8L|D1-FB}3Yz zj5&MM$D3Y{1s+>6r_vglg;N?{hx#F$;JT@JEGuc~5?I%02Xw)4=TcmTtTO+aS^mng zcm7d+6$HcqWkJt5ys6K=tf39$z@0DMm$@H2CY%o2|(M_eWy!bljZz^h87`_ zIy{rlCHM|x>X3e5#Es0QXy9VdbLkLoIsF?Nf0|i#F7mWRA2*2+8~7muN0kAj2k{<#Gp3z?K|?R`#vU)Mci4jpR=hqv zT2_?IMUKOeZV`s-@Kiads-aBdXpoWz^@hZG->tZwpNX8>W!@JJE&q95 zLdht*&JpQQSW?~qSWa*+mbnn+$0q?EEg|33;^#i6p_x&%KIl8gx07)>_k6?@L?U}C zFf=4zonlrTN za}m0#=R0^~(CL5(&MNBEWHjqqFd<+DZwy#iQq}Cl$cwS*1--$O3nj1RtqA7^B_S_X ziS!RUFjG754EszfN}vX%9O65W)oVs9lN`A>ihV%W1vPBb9c3yJjR`UyR^~@5{kpDA zna5UMkh=E}U~X%A-WUUm2$W%hf=Yi`i)G_HMnmFk08Pbl`|y2$ZA|ODEMSMcDc&S- zr|{UOGOdlOWz-0~<<|yC`u&;MR4f{`>9HYK_(Mi_P4m1OP0V|oJ4}V>E&?ZBHWae}lUD+2=q2*UvLL>*&MRtCLzSzi7h3@m(74E((OJNfGQq&5o*EaTlQ r#dk}P$285{DB08^Db2(pd6U8yej#K5UXW1&K-Ks8Cr*%NL*)VhkJ1_o diff --git a/lib/migrations/versions/415d27725948_create_freebies.py b/lib/migrations/versions/415d27725948_create_freebies.py new file mode 100644 index 000000000..bf9d38f7c --- /dev/null +++ b/lib/migrations/versions/415d27725948_create_freebies.py @@ -0,0 +1,37 @@ +"""create freebies + +Revision ID: 415d27725948 +Revises: 5f72c58bf48c +Create Date: 2024-07-15 23:04:40.034180 + +""" +from alembic import op +import sqlalchemy as sa + + +# revision identifiers, used by Alembic. +revision = '415d27725948' +down_revision = '5f72c58bf48c' +branch_labels = None +depends_on = None + + +def upgrade() -> None: + # ### commands auto generated by Alembic - please adjust! ### + op.create_table('freebies', + sa.Column('id', sa.Integer(), nullable=False), + sa.Column('item_name', sa.String(), nullable=True), + sa.Column('value', sa.Integer(), nullable=True), + sa.Column('company_id', sa.Integer(), nullable=True), + sa.Column('dev_id', sa.Integer(), nullable=True), + sa.ForeignKeyConstraint(['company_id'], ['companies.id'], name=op.f('fk_freebies_company_id_companies')), + sa.ForeignKeyConstraint(['dev_id'], ['devs.id'], name=op.f('fk_freebies_dev_id_devs')), + sa.PrimaryKeyConstraint('id') + ) + # ### end Alembic commands ### + + +def downgrade() -> None: + # ### commands auto generated by Alembic - please adjust! ### + op.drop_table('freebies') + # ### end Alembic commands ### diff --git a/lib/models.py b/lib/models.py index 2681bee5a..27c62ad98 100644 --- a/lib/models.py +++ b/lib/models.py @@ -1,6 +1,14 @@ from sqlalchemy import ForeignKey, Column, Integer, String, MetaData from sqlalchemy.orm import relationship, backref from sqlalchemy.ext.declarative import declarative_base +from sqlalchemy.ext.associationproxy import association_proxy + +from sqlalchemy import create_engine +from sqlalchemy.orm import sessionmaker + +engine = create_engine('sqlite:///freebies.db') +Session = sessionmaker(bind=engine) +session = Session() convention = { "fk": "fk_%(table_name)s_%(column_0_name)s_%(referred_table_name)s", @@ -16,8 +24,25 @@ class Company(Base): name = Column(String()) founding_year = Column(Integer()) + freebies = relationship('Freebie', backref='company') + devs = association_proxy('freebies', 'dev', + creator=lambda de: Freebie(dev=de)) + def __repr__(self): return f'' + + def give_freebie(self, dev, item_name, value): + freebie = Freebie( + item_name = item_name, + dev_id = dev.id, + value = value, + company_id = self.id + ) + return freebie + + def oldest_company(self): + oldest_company=session.query(Company).order_by(Company.founding_year).first() + return oldest_company.founding_year class Dev(Base): __tablename__ = 'devs' @@ -25,5 +50,32 @@ class Dev(Base): id = Column(Integer(), primary_key=True) name= Column(String()) + freebies = relationship('Freebie', backref='dev') + companies = association_proxy('freebies', 'company', + creator=lambda co: Freebie(company=co)) + def __repr__(self): return f'' + + def received_one(self, item_name): + for freebie in self.freebies: + if freebie.item_name == item_name: + return True + return False + + def give_away(self, dev, freebie): + if freebie.dev == self: + freebie.dev = dev + +class Freebie(Base): + __tablename__ = 'freebies' + + id = Column(Integer(), primary_key=True) + item_name = Column(String()) + value = Column(Integer()) + + company_id = Column(Integer(), ForeignKey('companies.id')) + dev_id = Column(Integer(), ForeignKey('devs.id')) + + def print_details(self): + return f'{self.dev.name} owns a {self.item_name} from {self.company.name}' diff --git a/lib/seed.py b/lib/seed.py index b16becbbb..fe2e7a0d8 100644 --- a/lib/seed.py +++ b/lib/seed.py @@ -1,3 +1,74 @@ #!/usr/bin/env python3 +from faker import Faker +import random -# Script goes here! +from sqlalchemy import create_engine +from sqlalchemy.orm import sessionmaker + +from models import Company, Dev, Freebie + +engine = create_engine('sqlite:///freebies.db') +Session = sessionmaker(bind=engine) +session = Session() + +fake = Faker() + +def create_companies(): + companies = [] + for i in range(10): + company = Company( + name = fake.unique.company(), + founding_year = random.randint(1986, 2024) + ) + companies.append(company) + + session.add_all(companies) + session.commit() + return companies + + +def create_devs(): + devs = [] + for i in range(10): + dev = Dev( + name = fake.unique.name() + ) + devs.append(dev) + + session.add_all(devs) + session.commit() + return devs + +def create_freebies(): + freebies = [] + for i in range(50): + freebie = Freebie( + item_name = fake.unique.name(), + value = random.randint(1, 100) + ) + freebies.append(freebie) + session.add_all(freebies) + session.commit() + return freebies + +def delete_records(): + session.query(Company).delete() + session.query(Dev).delete() + session.query(Freebie).delete() + session.commit() + +def relate_one_to_many(companies, devs, freebies): + for freebie in freebies: + freebie.company = random.choice(companies) + freebie.dev = random.choice(devs) + + session.add_all(freebies) + session.commit() + return companies, devs, freebies + +if __name__ == '__main__': + delete_records() + companies = create_companies() + devs = create_devs() + freebies = create_freebies() + companies, devs, freebies = relate_one_to_many(companies, devs, freebies) \ No newline at end of file