Use python modules to encode SQLAlchemy content schema instead of bin…

…aries.

kolibri/core/content/contentschema/versions/content_schema_1.py

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+# coding: utf-8
+from sqlalchemy import Boolean
+from sqlalchemy import CHAR
+from sqlalchemy import Column
+from sqlalchemy import Float
+from sqlalchemy import ForeignKey
+from sqlalchemy import Index
+from sqlalchemy import Integer
+from sqlalchemy import String
+from sqlalchemy import Text
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import relationship
+
+Base = declarative_base()
+metadata = Base.metadata
+
+
+class ContentContenttag(Base):
+    __tablename__ = "content_contenttag"
+
+    id = Column(CHAR(32), primary_key=True)
+    tag_name = Column(String(30), nullable=False)
+
+
+class ContentLanguage(Base):
+    __tablename__ = "content_language"
+
+    id = Column(String(14), primary_key=True)
+    lang_code = Column(String(3), nullable=False, index=True)
+    lang_subcode = Column(String(10), index=True)
+    lang_name = Column(String(100))
+    lang_direction = Column(String(3), nullable=False)
+
+
+class ContentLocalfile(Base):
+    __tablename__ = "content_localfile"
+
+    id = Column(String(32), primary_key=True)
+    extension = Column(String(40), nullable=False)
+    available = Column(Boolean, nullable=False)
+    file_size = Column(Integer)
+
+
+class ContentContentnode(Base):
+    __tablename__ = "content_contentnode"
+
+    id = Column(CHAR(32), primary_key=True)
+    title = Column(String(200), nullable=False)
+    content_id = Column(CHAR(32), nullable=False, index=True)
+    channel_id = Column(CHAR(32), nullable=False, index=True)
+    description = Column(String(400))
+    sort_order = Column(Float)
+    license_owner = Column(String(200), nullable=False)
+    author = Column(String(200), nullable=False)
+    kind = Column(String(200), nullable=False)
+    available = Column(Boolean, nullable=False)
+    stemmed_metaphone = Column(String(1800), nullable=False)
+    lft = Column(Integer, nullable=False, index=True)
+    rght = Column(Integer, nullable=False, index=True)
+    tree_id = Column(Integer, nullable=False, index=True)
+    level = Column(Integer, nullable=False, index=True)
+    lang_id = Column(ForeignKey("content_language.id"), index=True)
+    license_description = Column(String(400))
+    license_name = Column(String(50))
+    parent_id = Column(ForeignKey("content_contentnode.id"), index=True)
+
+    lang = relationship("ContentLanguage")
+    parent = relationship("ContentContentnode", remote_side=[id])
+
+
+class ContentAssessmentmetadata(Base):
+    __tablename__ = "content_assessmentmetadata"
+
+    id = Column(CHAR(32), primary_key=True)
+    assessment_item_ids = Column(Text, nullable=False)
+    number_of_assessments = Column(Integer, nullable=False)
+    mastery_model = Column(Text, nullable=False)
+    randomize = Column(Boolean, nullable=False)
+    is_manipulable = Column(Boolean, nullable=False)
+    contentnode_id = Column(
+        ForeignKey("content_contentnode.id"), nullable=False, index=True
+    )
+
+    contentnode = relationship("ContentContentnode")
+
+
+class ContentChannelmetadata(Base):
+    __tablename__ = "content_channelmetadata"
+
+    id = Column(CHAR(32), primary_key=True)
+    name = Column(String(200), nullable=False)
+    description = Column(String(400), nullable=False)
+    author = Column(String(400), nullable=False)
+    version = Column(Integer, nullable=False)
+    thumbnail = Column(Text, nullable=False)
+    last_updated = Column(String)
+    min_schema_version = Column(String(50), nullable=False)
+    root_id = Column(ForeignKey("content_contentnode.id"), nullable=False, index=True)
+
+    root = relationship("ContentContentnode")
+
+
+class ContentContentnodeHasPrerequisite(Base):
+    __tablename__ = "content_contentnode_has_prerequisite"
+    __table_args__ = (
+        Index(
+            "content_contentnode_has_prerequisite_from_contentnode_id_c9e1d527_uniq",
+            "from_contentnode_id",
+            "to_contentnode_id",
+            unique=True,
+        ),
+    )
+
+    id = Column(Integer, primary_key=True)
+    from_contentnode_id = Column(
+        ForeignKey("content_contentnode.id"), nullable=False, index=True
+    )
+    to_contentnode_id = Column(
+        ForeignKey("content_contentnode.id"), nullable=False, index=True
+    )
+
+    from_contentnode = relationship(
+        "ContentContentnode",
+        primaryjoin="ContentContentnodeHasPrerequisite.from_contentnode_id == ContentContentnode.id",
+    )
+    to_contentnode = relationship(
+        "ContentContentnode",
+        primaryjoin="ContentContentnodeHasPrerequisite.to_contentnode_id == ContentContentnode.id",
+    )
+
+
+class ContentContentnodeRelated(Base):
+    __tablename__ = "content_contentnode_related"
+    __table_args__ = (
+        Index(
+            "content_contentnode_related_from_contentnode_id_fc2ed20c_uniq",
+            "from_contentnode_id",
+            "to_contentnode_id",
+            unique=True,
+        ),
+    )
+
+    id = Column(Integer, primary_key=True)
+    from_contentnode_id = Column(
+        ForeignKey("content_contentnode.id"), nullable=False, index=True
+    )
+    to_contentnode_id = Column(
+        ForeignKey("content_contentnode.id"), nullable=False, index=True
+    )
+
+    from_contentnode = relationship(
+        "ContentContentnode",
+        primaryjoin="ContentContentnodeRelated.from_contentnode_id == ContentContentnode.id",
+    )
+    to_contentnode = relationship(
+        "ContentContentnode",
+        primaryjoin="ContentContentnodeRelated.to_contentnode_id == ContentContentnode.id",
+    )
+
+
+class ContentContentnodeTags(Base):
+    __tablename__ = "content_contentnode_tags"
+    __table_args__ = (
+        Index(
+            "content_contentnode_tags_contentnode_id_64a4ac15_uniq",
+            "contentnode_id",
+            "contenttag_id",
+            unique=True,
+        ),
+    )
+
+    id = Column(Integer, primary_key=True)
+    contentnode_id = Column(
+        ForeignKey("content_contentnode.id"), nullable=False, index=True
+    )
+    contenttag_id = Column(
+        ForeignKey("content_contenttag.id"), nullable=False, index=True
+    )
+
+    contentnode = relationship("ContentContentnode")
+    contenttag = relationship("ContentContenttag")
+
+
+class ContentFile(Base):
+    __tablename__ = "content_file"
+
+    id = Column(CHAR(32), primary_key=True)
+    available = Column(Boolean, nullable=False)
+    preset = Column(String(150), nullable=False)
+    supplementary = Column(Boolean, nullable=False)
+    thumbnail = Column(Boolean, nullable=False)
+    priority = Column(Integer, index=True)
+    contentnode_id = Column(
+        ForeignKey("content_contentnode.id"), nullable=False, index=True
+    )
+    lang_id = Column(ForeignKey("content_language.id"), index=True)
+    local_file_id = Column(
+        ForeignKey("content_localfile.id"), nullable=False, index=True
+    )
+
+    contentnode = relationship("ContentContentnode")
+    lang = relationship("ContentLanguage")
+    local_file = relationship("ContentLocalfile")